Include multiple PDFs with different size and additional text on one page

I have several PDF files containing vector graphics. They all have customized sized such that there is no white border present. Now I want to combine them on a single page with some additional text.

In the end it should look something like this:

What is the easiest solution to obtain this? I tried using the standalone class and insert the PDFs with \includegraphics, but standalone seems to ignore many formatting orders and I am unable to make the page look as I want. Maybe there are better solutions.

Thanks for any suggestion

My suggestion is use any document type and just mess with the margins. For the other features you will find simple answers anywhere, that's one of the multiple possible choices:

\documentclass[]{article}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage{vmargin} % para editar los margenes
\setpapersize{USletter}
\setmargins{2cm}% margen izquierdo
{1.5cm}     % margen superior
{17cm}      % anchura del texto
{23.42cm}   % altura del texto
{10pt}      % altura de los encabezados
{1cm}       % espacio entre el texto y los encabezados
{0pt}       % altura del pie de página
{1cm}       % espacio entre el texto y el pie de página
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage[demo]{graphicx}
\usepackage{caption,subcaption}

\begin{document}

\centering \Huge Title

\begin{figure}[htbp]\centering
\includegraphics[width=\linewidth]{imagefile}
\caption{Figure 1 text}
\end{figure}

\begin{figure}[htbp]\centering
\includegraphics[width=\linewidth]{imagefile}
\\Figure 2 text (but in text mode, not in caption)
\end{figure}

\begin{figure}[htbp]\centering
\begin{subfigure}{0.2\textwidth}
\includegraphics[width=\linewidth]{imagefile}
\caption{Figure 3 text}
\end{subfigure}
\begin{subfigure}{0.485\textwidth}\centering
\includegraphics[width=\linewidth]{imagefile}
\\Figure 4 (in text mode)
\end{subfigure}
\begin{subfigure}{0.3\textwidth}
\includegraphics[width=\linewidth]{imagefile}
\caption{Figure 5 text}
\end{subfigure}
\caption{Figures 3, 4 y 5}
\end{figure}

\end{document}


and I get something like this