TDG hasn't released a ballad as a single. :P And none of their non-singles were hits. (so PLEEASEE release "Last To Know"
)
Shinedown...well some people count If You Only Knew as a ballad. And same with 45. They were both pretty successful. 2 of their most successful songs. :P (excluding Second Chance.)
Daughtry...yesss indeed. Home, What About Now, Life After You, September
Evanescence, My Immortal, Good Enough (well...kind of)
Apocalyptica...i think their only real successful songs were their collabs (which are all heavier). Their symphonies aren't very known.
Breaking Benjamin - Give Me a Sign
I have way too many faves. D;