A fighting game wouldn't be a bad idea. It could simply put players in the front row seat of the action like an audience member, but I'm not sure if that would work for fighting games that involve breaking from one arena to another (MKvDC, Injustice 2, etc)
But a FP track and field racing game would be nice to. idk VR basically relies on first person mode so for that it's very limited in terms of games. Any COD game would work too though.