\documentclass{article}

\usepackage[utf8]{inputenc}
\usepackage{booktabs}
\usepackage{tabularx}
\usepackage{ragged2e}
\usepackage{amssymb}
\usepackage{cmbright}
\usepackage{graphicx}
\usepackage{textpos}
\usepackage[colorlinks]{hyperref}
\usepackage{float}
\usepackage[margin=1cm]{geometry}

\renewcommand{\arraystretch}{1.5}

\newcolumntype{Y}{>{\RaggedRight\arraybackslash}X}
\begin{document}

% HEADLINE
{\noindent\LARGE\textsc{MEMBERLIST-TITLE}}\\
\textit{Erstellt: MEMBERLIST-DATE}\\

\begin{table}[H]
	\begin{tabularx}{\textwidth}{@{} l l Y @{}}
    \toprule
	\textbf{Name} & \textbf{Kommentare} \\
    \midrule
    TABLE
    \bottomrule
  \end{tabularx}
\end{table}

\end{document}