Jim Halpert (John Krasinski)
First seen- Season one, episode 1 This bored salesman spends more time staring at the receptionist, Pam, and pranking his frenemy, Dwight, than he does working.
Last seen- Season nine, episode 24/25 Jim and his wife, Pam, move to Austin, TX (yeehaw) so Jim can run the sports marketing company he co-founded. The pair have two children together.
Nope, that theory is debunked :)