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 have tried it, however I feel it’s a bit dated. I wanted to like it, but I didn’t succeed. I can imagine however that back on it’s release date is was pretty groundbreaking.