Well, judging by some of the stuff you like, I'd recommend:

My Chemical Romance- Get the first album (I Brought You My Bullets, You Brought Me Your Love), it's better than their second

Hawthorne Heights- 'The Silence in Black and White' and 'If Only You Were Lonely'

Senses Fail- 'Let it Enfold You'

From First to Last- 'Dear Diary, my Teen Angst has a Bodycount'

Silverstein- 'Discovering the Waterfront'

Those are all pretty similar to The Used (the 5 mentioned there are screamo bands)

If you like Fall Out Boy, Panic! at The Disco sounds a lot like them...

And just because I like them, I'll say Green Day too. Dunno if you like them though.