Another Spider-Man supporting character: John Jameson.
Introduced as J. Jonah Jameson's astronaut son (who Jameson would praise as 'the REAL hero, unlike that phoney Spider-Man'), there are times when he's pretty much been irrelevant, and the writers have to give him just about anything to do. I can't remember how he ended up working at Ravencroft (the Spider-comics equivalent to Arkham Asylum), but it gave him something to do.
One of the funniest career moves in the late 1970's/early 1980's was radio DJ as well. I have a Savage She-Hulk 13/14 where he was a radio DJ.
I think John Jameson has jokingly held every job now we can think of.
"Heads up-- If Havok's position in UA #5 really upset you, it's time to drown yourself hobo piss. Seriously, do it. It's the only solution." - Rick Remender