I came at this one from the angle of: assume you were playing a 1-shot comedy session where you randomly rolled your character class. Which one would i least want to roll up?
Turns out I think it would at least be funny to RP most of these for the duration of a short session. Some of these are So Bad They're Awesome, like the Ghetto Fighter or the Mine Rowdy. Some would just be ridiculous enough that I can imagine how I'd play them for comedy, like the Unicorn Rider or the Beggar.
For most of the classes I can get a quick mental image of what I'd do to play one in a dumb fun one-shot. But I have no idea what the Rapid Response Rider is, and looking it up makes it sound even more dull and generic, and not even in a way that lets me mine it for ridiculousness. It's straightforwardly boring, and that's a much bigger sin to me than being distinctly ridiculous. So that's my vote!