well,id like to recommend a few include paramore, onerepublic, the fray, maroon5, chris brown, ne-yo, my chemical romance (quite similar with linkin park in a way or the other, but u really cant equalize both of 'em)..
well, many more actually but try to listen to some of those songs. get well attached with any of the genre, and u will (hopefully) easily find the other songs/group/artist later...
cheers