Carwin, Condit, Randy
They all seem to go from winning the interim belt, right up into a unification fight. 
Nog tried but lost it... :(
Arlovski did, also Melendez did in Strikeforce
Couture did against Tito
Fedor took the interim black entertainment television title from Rogers via Abongo Humphrey
joshuraw - Couture did against Tito
No, Couture won the interim against Chuck and then in his next fight he won the undisputed title from Tito.