Frankly, I would leave Obsidian Entertainment alone. They managed to half-ass Outer Worlds and its sequel. Obsidian caught lightning in a bottle with New Vegas, they are not a 'thing'.
Starfield did well revenue-wise. The gaming community at-large was not happy with it (i.e. buyer's remorse) and it will be interesting to see if Bethesda can fool the public twice on this one.
Fallout 76 is well-above where it was when it was released. I'm going to reserve judgement on the Raven Rock expansion, but honestly 76 is just a scavenger-hunt with guns and RMT out the wazoo.
Disclosure: I have played all these games except Starfield. I have had my eyes opened by Expedition 33, and I don't look at these heavy-hitter game publishers the same way anymore.
The thing is, even a half-assed New Vegas 2 from Obsidian would probably be better than Fallout 5.
The question is, how woke will it be?