"Beamer-style" title page with logo, title, etc

Question

I've put together a thesis title page but I want to turn it into a template à la Beamer. That is: I want to define variables for the title, author, supervisor, university logo and name and jury members--this last one optional!

Here's my MWE:

\documentclass[12pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{fontenc}
\usepackage{graphicx}
\usepackage[osf]{mathpazo}
\usepackage[left=2.5cm,right=2.5cm,top=2.5cm,bottom=1.8cm]{geometry}
\begin{document}
\begin{titlepage}
\begin{center}
\vfill
{
\includegraphics[scale=0.5]{logo.png}\par
\fontsize{29}{25}\selectfont
\textbf{The Poison Ivy University}
\par
    {
        \fontsize{15}{13}\selectfont Doctoral Programme on Antidisestablishmentarianist Phisphology at the Institute of Useless Research and the Department of Occult Sciences
    \par}
\rule{\textwidth}{2pt}
}

{\fontsize{22}{37}\selectfont%
\textbf{Rather obnoxious, unnecessarily long and incomprehensible title on a very obscure and unimportant topic}}
\vfill
{
    \fontsize{19}{19}\selectfont%
    \textsc{thesis}\par
}

{
    \fontsize{14}{19}\selectfont
    To obtain the futile degree of
\par
}
{
    \fontsize{16}{19}\selectfont
    \textsc{doctor of phisphology}
}
\vfill
{\fontsize{14}{19}\selectfont Submitted by:\par}

{
    \fontsize{18}{16}\selectfont%
    Bashed Grad Student\par
}
\vfill

{
    \fontsize{16}{16}\selectfont% 
    Advisor: 

    Herr Prof. Dr. Hab. Merkwürdige Liebe
\par} 

{\fontsize{12}{14}\selectfont Department of Explosive Relaxation, PIU\par}
\vfill

{
    \fontsize{14}{25}\selectfont%
    Members of the Jury:\par
}

    {
    \fontsize{18}{25}\selectfont
    Dr. Prost. Vogon Jeltz\par
        {
        \fontsize{12}{14}\selectfont Department of Transplutonian Literary Theory, PIU
        \par
        }
    }

    {
    \fontsize{18}{25}\selectfont
    Dr. Hab. Gent. Tristram Shandy\par
    }
    {
    \fontsize{12}{14}\selectfont Department of Lifes and Opinions, PIU
    \par
    }

\vfill
{\fontsize{14}{12}\selectfont {Arkham, Massachusetts, Brumaire \textsc{anno v}}}
\end{center}
\vfill
\rule{\textwidth}{2pt}
\end{titlepage}
\end{document}

There are many questions that ask on formatting of a title page (e.g. this one and this one) but I think I've got that sorted out. What I want are variables for the contents of the title page; of course the code above requires a beginning and ending of a document, but in real-life I'd like just to input the "variables" on the preamble and use a \maketitle command or something simimlar to produce the output; that is, I want to be able to type in the preamble something like \institution, \advisor, \jurymember (this one is optional), \advisor, etc.

Any ideas?

PS. I include the logo.png file and a screencap of the output just for the sake of completeness.