Really, no company is probably "good" ethically these days. So nitpicking on who's best wouldn't be productive.
But I'm open to possibilities! Maybe they could try MonsterArts again with Bandai as that line has grown as well as their way sculpts and quality. Hiya seems to be doing okay, though I prefer larger scale. It's all about price point really, and NECA had that on lock years ago, but then prices started going up and up over time.
Could a new company bring the quality we are used to with NECA sculpts at a low price point fans and consumers would be happy with? That's the actual challenge.
I think whoever would take over would have a lot of pressure to perform right off the bat, which may not be exactly fair. It took NECA years to finally lock in their build to something that worked.