Depending what you're having them play on (real hardware vs emulation), I say either a default controller or a PS2-like (e.g 8BitDo) controller across the board.
Most folks at this time have had experience with the latter or something close, and fits a majority of hands + games.
Most folks at this time have had experience with the latter or something close, and fits a majority of hands + games.
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Personally: I had two PS2-likes + older arcade sticks cover most emulation. I've never had anyone legit complain about controllers. They likely exist, but they just won't play.
People expect to use provided controllers, if that helps. It's rare to find complaints on that.