The GUI page is a bit out of date imo, or I'm not sure how does the selection work because there are countles GUI options nowadays. Anyways some of the best options are not even mentioned like

Nocheto https://nocheto.sallyx.org/ (this my favorite)

ChessMD https://chessmd.org/

PyChess https://pychess.github.io/about/

If you like uncomplicated GUIs: http://mayura.com/chess/

I really like ChessX ( https://chessx.sourceforge.io/ ). Pychess was always unstable and slow for me.

Anyways. Now I can use an even better Stockfish to benchmark my own engine..

I have tried En Croissant and its personally its a nice GUI and easy to use. It allows you to download stockfish and others right from their GUI.