Haven't tried the DJ app, but the rest are classics. Superbrothers is probably my favorite game for iOS.
There are a ton more going free, too:
Dead Space for iPad
Flight Control HD
Infinity Blade II
Mini Motor Racing
Mirror’s Edge for iPad
Superbrothers: Sword and Sworcery
Tiny Wings HD
Where’s My Water?
Badland is the newest, so it's a little early to call it a classic, but it's very good. Flight Control has been improved upon by other games since, but still holds up. The only one on here I wouldn't call a classic is Mini Moto Racing, but I may have to give it a go and see if it just didn't click with me.
Angry Bird Star Wars