Customization of biblatex style - same as natbib plainnat

Question

Before switch to biblatex, I was using bibtex like this:

\usepackage[round, semicolon, authoryear]{natbib}
\bibliographystyle{plainnat}

I'd like to get the very same style with biblatex (without usage of natbib backward compatibility).

In the text, in case of two authors, I wish only "Smith and Jones (2017)" (as \citet) or "(Smith and Jones 2017)" (as \citep). I don't mind if there is "et" or "&" instead of "and". In case of 3 and more authors, I wish only "Smith et al. (2017)" (as \citet) or "(Smith et al., 2017)" (as \citep).

In the bibliography listing, I wish all authors, and I'd prefer the title to be bold and not in quotes, but I can live without it.

All this was very straightforward with natbib above and citet/citep, but I can't figure out how to reach it in with biblatex/biber. My main reason to switch to biblatex was basically no reasonable way how to sort accented characters with bibtex.

Simply, in the best case, it should look like following picture:

Some settings (like back referenes) I managed to set, but for the above I really do struggle...

I also must say I like more some features of biblatex, like clickable DOI or back references "(cit. on p. XX)".

Problematic working example is

\documentclass{article}
\usepackage{xltxtra}
\usepackage{fontspec}
\usepackage{realscripts}
\usepackage{metalogo}
\usepackage{xunicode}
\usepackage[autostyle=true, english=british]{csquotes}
\usepackage{polyglossia}
\setdefaultlanguage[variant=british]{english}
\usepackage{filecontents}
\usepackage[x11names]{xcolor}
\usepackage[
backend=biber,
bibstyle=authortitle,
citestyle=authoryear-comp,
autocite=inline,
sorting=ynt,
sortcase=true,
sortcites=true,
maxbibnames=100,
mincitenames=1,
maxcitenames=2,
hyperref=true,
backref=true,
backrefstyle=none,
maxalphanames=1
]{biblatex}
\usepackage[
breaklinks=true,
colorlinks=true,
linkcolor={Firebrick4},
anchorcolor={Blue4},
citecolor={Green4},
filecolor={DeepPink4},
menucolor={Chocolate4},
urlcolor={DodgerBlue4},
bookmarks=true,
pdfencoding=auto,
unicode=true,
xetex
]{hyperref}
\addbibresource{references.bib}
\begin{document}
\begin{filecontents}{references.bib}
@article{Shaw2005,
author={Shaw, Joey and Lickey, Edgar B and Beck, John T and Farmer, Susan B and Liu, Wusheng and Miller, Jermey and Siripun, K C and Winder, Charles T and Schilling, Edward E and Small, Ramdall L},
doi={10.3732/ajb.92.1.142},
issn={0002-9122},
journal={American Journal of Botany},
month={01},
number={1},
pages={142--166},
title={{The tortoise and the hare II: relative utility of 21 noncoding chloroplast DNA sequences for phylogenetic analysis}},
url={https://onlinelibrary.wiley.com/doi/full/10.3732/ajb.92.1.142},
volume={92},
year={2005}
}
@article{Shaw2007,
author={Shaw, Joey and Lickey, Edgar B and Schilling, Edward E and Small, Ramdall L},
doi={10.3732/ajb.94.3.275},
issn={0002-9122},
journal={American Journal of Botany},
month={03},
number={3},
pages={275--288},
title={{Comparison of whole chloroplast genome sequences to choose noncoding regions for phylogenetic studies in angiosperms: the tortoise and the hare III}},
url={https://onlinelibrary.wiley.com/doi/full/10.3732/ajb.94.3.275},
volume={94},
year={2007}
}
\end{filecontents}
XXX \textcite{Shaw2005} XXX \textcite{Shaw2007} XXX \textcite{Shaw2005,Shaw2007}, XXX \parencite{Shaw2005} XXX \parencite{Shaw2007} XXX  \parencite{Shaw2005,Shaw2007} XXX.
\printbibliography
\end{document}

It renders as:

There should be only "Shaw et al (2005)" and so on. Only one name before "et al", no more.

Answer 1

With the help and good point by @moeve, I can solve it like this:

\documentclass{article}
\usepackage[british]{babel} % Languages
\usepackage{filecontents} % Included exemplary file
\usepackage[x11names]{xcolor} % Color names
\usepackage[ % Bibliography settings
backend=biber,
bibstyle=authoryear,
citestyle=authoryear-comp,
autocite=inline,
maxbibnames=100,
mincitenames=1,
maxcitenames=2,
hyperref=true,
backref=true,
backrefstyle=none,
uniquelist=false
]{biblatex}
\DeclareFieldFormat[article]{title}{\mkbibbold{#1}} % Bold article title
\addbibresource{test.bib}
\usepackage[ % Links settings
breaklinks=true,
colorlinks=true,
linkcolor={Firebrick4},
anchorcolor={Blue4},
citecolor={Green4},
filecolor={DeepPink4},
menucolor={Chocolate4},
urlcolor={DodgerBlue4},
bookmarks=true,
pdfencoding=auto,
unicode=true,
xetex
]{hyperref}
\begin{document}
% Exemplary bibliography
\begin{filecontents}{test.bib}
@article{Shaw2005,
author={Shaw, Joey and Lickey, Edgar B and Beck, John T and Farmer, Susan B and Liu, Wusheng and Miller, Jermey and Siripun, K C and Winder, Charles T and Schilling, Edward E and Small, Ramdall L},
doi={10.3732/ajb.92.1.142},
issn={0002-9122},
journal={American Journal of Botany},
month={01},
number={1},
pages={142--166},
title={{The tortoise and the hare II: relative utility of 21 noncoding chloroplast DNA sequences for phylogenetic analysis}},
url={https://onlinelibrary.wiley.com/doi/full/10.3732/ajb.92.1.142},
volume={92},
year={2005}
}
@article{Shaw2007,
author={Shaw, Joey and Lickey, Edgar B and Schilling, Edward E and Small, Ramdall L},
doi={10.3732/ajb.94.3.275},
issn={0002-9122},
journal={American Journal of Botany},
month={03},
number={3},
pages={275--288},
title={{Comparison of whole chloroplast genome sequences to choose noncoding regions for phylogenetic studies in angiosperms: the tortoise and the hare III}},
url={https://onlinelibrary.wiley.com/doi/full/10.3732/ajb.94.3.275},
volume={94},
year={2007}
}
\end{filecontents}
% The document
XXX \textcite{Shaw2005} XXX \textcite{Shaw2007} XXX \textcite{Shaw2007,Shaw2005}, XXX \parencite{Shaw2005} XXX \parencite{Shaw2007} XXX  \parencite{Shaw2007,Shaw2005} XXX.
\printbibliography
\end{document}