I'd have to say Bryan Adams, followed by Bruce Springsteen and then Bon Jovi. This is the first time I've ever heard of Heartland Rock, but there sure are some good artists in the genr.
So essentially, it's about working life in America?
What do yoy think the best song in the genre is? I'd say Atlantic City by The Boss. Also, for some odd reason fuckin republicans always try unsucusefully to use songs by these artist as campaign themes.