The only select fangames that I thought would be unique and successful within the community, there is always a handful of drama revolving them, like Undertale: Nihilism, BnP, and many more.

And some of them are falling apart due to loss of motivation and less team members than required like Half-Mask and Undertinge (I really pray @Mr-Mitten gets enough team members, I am really surprised by how much potential Undertinge has.)

I can't find a single good non-Sans revolving fangame/AU other than ULB, UT:ICEBOUND, Undertinge, and some fangames revolving other humans like UT: Wildfire and some more.