Another vote for Tarrasch
Best Free GUIs to run Stockfish 13 on Windows PC?

I think the Tarrasch GUI is pretty good, it is free and I think it is much better than Arena
Lucas Chess has an interesting feature, you can use it to get an accuracy score for a game, but it takes a while
wait really?

I think the Tarrasch GUI is pretty good, it is free and I think it is much better than Arena
Lucas Chess has an interesting feature, you can use it to get an accuracy score for a game, but it takes a while
wait really?
Arena has automatic analysis. It will tell you how many times you did identical moves with engines first choice in a game.

I have never heard anybody mention Jose Chess before, but I would consider it the best program. https://sourceforge.net/projects/jose-chess/
<snip>
I never really used Jose much. However, people just need to be aware that it requires the installation of Java Runtime Environment.
Is there a good GUI where it's easy to turn off the 50 move rule, e.g. to opt for current FIDE basic rules?
Also is there a good GUI that will list available engine options (as sent by the engine in the option command)? I'm assuming this is where you'd turn off the 50 move rule in the engine.
I think the Tarrasch GUI is pretty good, it is free and I think it is much better than Arena
Lucas Chess has an interesting feature, you can use it to get an accuracy score for a game, but it takes a while
wait really?
Arena has automatic analysis. It will tell you how many times you did identical moves with engines first choice in a game.
I've got Tarrasch. Can you tell it to play engines against each other? (I do that in Arena, but I find Tarrasch generally easier to use.)

…pain in the a** ??? - The PGN import is very easy. I do it almost every day. No problem at all.

I think the Tarrasch GUI is pretty good, it is free and I think it is much better than Arena
Lucas Chess has an interesting feature, you can use it to get an accuracy score for a game, but it takes a while