I like the Dandy Warhols a good bit, I can second that recommendation. And I agree about Rooney.
You might also like Guster and Gomez.
Agree with Fountains of Wayne, and would start with Welcome Interstate Managers.
The single band I’d identify as most like O.A.R. is Guster. Maybe try the earlier albums like Goldfly, Parachute, and Lost and Gone Forever.
how about The Might Be Giants, Devo…
how about They Might Be Giants, Devo…