Personally I think the ending I'm most likely to pick for good characters is too miserable (and I speak as someone who was perfectly okay with their favourite Commander Shepherd ending up as a reaper after three full games). But there are a significant number of people in the poll in that thread I linked to who were happy with alternative solutions for good characters, so it doesn't seem right to characterise it as the "best good ending". But it's probably best to continue any discussion over there rather than here.

"You may call it 'nonsense' if you like, but I've heard nonsense, compared with which that would be as sensible as a dictionary!"