I believe The Beatles: Rock Band came the closest to being perfect. Eveything about that game was just beautifully done and the only things missing was Pro Drums, an option for Keys, and a few more Beatle songs (Hey Jude, Strawberry Fields Forever, Yesterday etc. etc.)
I guess it depends on how you define ‘perfect’- personally even with the bugs it’s one of the best games I’ve played in terms of how it makes me feel and what I get out of it. It might not be the best performing game ever but that’s different imo
Yeah this is how I’d look at it. Skyrim’s engine might be absolute dogshit and it might be buggy as a cheap motel mattress, but there’s other kinds of perfection than just perfection of the tech