Some good post-hardcore there (mainly ATDI, Refused, and Thursday).
I admit, I haven't listened to You and I or LOTN, but an accessible band that a lot of people seem to enjoy is Envy, which I also enjoy. A more conventional screamo band that I find accessible as well is I, Robot.
Also check:
MySpace.com - Caitlyn Bailey - DC, Region XI - Punk / Soul / Thrash - www.myspace.com/caitlynbailey
You can download their EP free, and the screamer is a member of Musicbanter.
I'm no screamo expert, though.