Since THOR is Marvel Comics, primary jobber. Who is DC comics jobber?
Depends on the book. But:
Superman tends to job every single first encounter he has so we can see him rise above it, and ofc just to see how assbad the bad guy is. When beating on him isn't cool, it's the Manhunter. Both in JL settings ofc.
Elsewhere... Well I would say Raven jobs quite hard as well, considering she has on several occasions ended fights just by pulling herself together, it's quite predictable to see her amongst the first to get knocked out whenever a fight breaks out (Hendersons TT was especially bad at this).
It depends everyone has their jobber moments. It's happened to Flash, Superman, Wonder Woman and Martian Manhunter and when you think about it that should never happen much like Thor but this is in the powerhouse range also since the start of Marvel Now Thor isn't very much a jobber anymore plus even Hulk went into a jobbing area because of Aaron but he's now back on track.
Scarecrow, Parasite, Metallo, Killer Croc, Clayface, Riddler had all become consistent jobbers but that seems to be changing for some of them which is good.