I'll post some songs here that I think are easy to play because they have 3 chords or so. I will also take all of your suggestions and post your choices as well!
Hey There Delilah -Plain White T's (Capo on 2nd) or Play open
When I Come Around - Green Day
Bob Marley -Three Little Birds
David Gilmour (Pink Floyd) -Wish You Were Here
Under the Bridge -Red Hot Chili Peppers (this is a tough one!)