40k inquisitor is better than it has any right to be (especially considering the dire state at early access and launch). Co-op is somewhat unstable and I don't think anyone does pvp. Loads of endgame. Get the game when it goes on sale (it's overpriced but go on deep discount often)

Ghostlore is a pretty neat indie arpg. No online play but has split screen co-op and remote play together support on steam.

Undecember and Torchlight Infinite are pc/mobile arpgs with cross progression. Neither is amazing, but both have gotten much better than at launch. Torchlight feels like zoom-zoom poe and gets fun quickly but has less longevity, undecember takes longer to get going but stays interesting for longer. (and both should have new leagues/content out within a month or two)

Keep an eye out for The Slormancer. I suspect it'll be quite good once it's out of early access.

Grim Dawn is probably well known enough that I don't need to talk it up much. It's one of the GoaT arpgs.

And finally, Last Epoch. It's probably the closest we'll see to the complexity and depth of poe in a very long time. Still in early access but incredibly good. Endgame lacks variety, but what's there is great.