Not B-listers or C-listers at all; that list just represents how the title (and Marvel Comics in general) changed from the Silver Age to the modern age. Us old-timers are *very* familiar with the "terrestrial" enemies of Thor (e.g., Radioactive Man, Mister Hyde, Absorbing Man, Grey Gargoyle, Wrecking Crew), but the title started moving more towards Asgard and high fantasy instead of pure superhero genre in the late 80s and onwards, so you younger generations are virtually unaware of that era and how many times Thor clashed with those villains.
This has always been the dilemma of Thor, and remains so for Marvel Studios in the MCU: should Thor be portrayed more as a god of remote Asgard (high fantasy), or as a superhero defending Earth from supervillains?