If you are going to include Benedict Arnold, you should include Nathan Hale (Coventry). And if including pop musicians (ugh!), Karen and Richard Carpenter (New Haven/East Haven) merit inclusion.
Benedict Arnold was born British in 1741, so one might argue his betrayal was joining the "rebel scum" (quote from Star Wars) of the independence movement before realising his error. Of course, as a Brit, I am a little biased. :)
Caroll Spinney (Big Bird/Oscar the Grouch) and Brian Dennehy, both long time residents of Woodstock. (Dennehy born in Bridgeport)