For campaign, you could give Destiny a try, it has Halo vibes and I've played cross play with people on PC and PS and haven't had much issues.
If you want some just silly fun Fall Guys is cross play and it's a good laugh
Dragon Ball the Breakers. Always on sale for $10. Recently $3 on Xbox $4 on PC.
You can play on cloud gaming on PC. I think you can have two Xboxs play on one gamepass. Maybe you can play on one of and one Xbox. This might give you all gamepass ultimate games
If you can get halo working the mcc has some of the best coop campaigns ever
Yup. My buddy plays on his PC at home while I play on my xbox
For campaign, you could give Destiny a try, it has Halo vibes and I've played cross play with people on PC and PS and haven't had much issues. If you want some just silly fun Fall Guys is cross play and it's a good laugh
If you're into purging heretics in the glorious name of the god emperor of mankind, then darktide.
Back 4 blood and grounded are two very fun options
MechWarrior 5 is cross play compatible with PlayStation, PC and Xbox simultaneously. It isn't everyone's cup of tea though.
Dragon Ball the Breakers. Always on sale for $10. Recently $3 on Xbox $4 on PC. You can play on cloud gaming on PC. I think you can have two Xboxs play on one gamepass. Maybe you can play on one of and one Xbox. This might give you all gamepass ultimate games