Figure at the bottom of page

Question

I am trying to put Fig 2 at the bottom of page 2 and Fig 3 at the bottom of page 3.

\documentclass[reprint]{revtex4-1}
\usepackage{graphicx, float, placeins}
% \usepackage{dblfloatfix}
\usepackage{blindtext}

\begin{document}

\blindtext[3]

\begin{figure}[!h]
   \centering
   \includegraphics[height = 4cm]{example-image.png}
   \caption{fig1}
\end{figure}

\blindtext[3]

\blindtext[3]

\begin{figure*}[!b]
   \centering
   \includegraphics[width = 15cm]{example-image.png}
   \caption{fig2}
\end{figure*}

\begin{figure*}[!b]
   \centering
   \includegraphics[height = 4cm]{example-image.png}
   \includegraphics[height = 4cm]{example-image.png}
   \caption{fig3}
\end{figure*}

\end{document}

One solution I found here (put figure at the bottom of the FIRST page) but if I have a page full of text and then I am trying to put the figure at the bottom of the page, the text do not move to next page instead the text and figure get overlapped.