That's funny. I was going to say Kermit. I spent last night thinking of more answers past the two I already gave, and he was one of them. June is also on my list, and so is Beaver. Here are some others from past and present:

Latke from Taxi

Buffy from Family Affair

Charles from Little House on the Prairie

Derek from Guiding Light

Will and Parker from As the World Turns

Jake from The Guardian

The Pillsbury Doughboy

Sam and David from 7th Heaven