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 just think that everything the game was going for was perfectly done. Just the recreation of the early live shows and the dreamscapes alone is worth the price of admission, on top of the fact that while it is much easier than any other rock band title, there’s still plenty of fun to be had especially with friends. Outside of the 3 things in my original post I can’t really find any fault in the game