I'm not beating myself up about the passing of Wogan but he was wonderfully merciless about 'Dallas' (especially the 'Poisoned Dwarf)and arguably increased the programmes popularity.
He furthered the causes of folk and country music (I reckon that Kenny Rogers probably thanked him for sending up 'Lucille') and his whimsical mocking of the ridiculous European Song Contest was the only element that made it worthwhile.
Unlike the majority of DJs I could listen to him while driving to work without wanting to smash the radio.