At the moment I see no other solution than using e. g. the authblk package. For details please refer to the package manual.
\documentclass[11pt,a4paper,english]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{babel}
\usepackage{authblk}
\usepackage{blindtext}
\title{Two Authors with same Affiliation}
\author{Author One}
\author{Author Two}
\affil{Affiliation}
\begin{document}
\maketitle
\blinddocument
\end{document}
The blindtext package is only for creating dummy text thus not part of the solution