I don't think there's any band doing what Dragonforce is doing. There are other heavy, melodic bands, but none with their flair or just sick, sick soloing.
PowerQuest has some ex-Dragonforce members(before they hit it big), and they have Dragonforce's style of melody, but they aren't very heavy and the guitar playing is merely average. That's about as close a match as I can see, and it's not really even that close.