Just because he voiced Ed means he can voice every blond person. That makes sense, overall I suppose. Sure, he doesn't have the voice for Tamaki, but he's an awesome VA nonetheless. Honestly though, I think Crispin Freeman would be better for Tamaki, but I don't think he's with the same group of VA's and stuff. Actually, Crispin Freeman should voice the entire host club, including Haruhi, and all the other characters as well.

Crispin Freeman is the best English dub voice actor ever. surprised