Yeah, “odd man out” questions are very hard to make so there’s only one answer and it’s not ridiculously easy. There can be reasons to pick any one of the three.
Manhunter, for instance, is the only one with an unconnected, Golden Age character with the same name.
You need to ask specific questions, like this:
What’s the full name of the the character usually billed as “the world’s maddest mad scientist”?
RealityChuck is apparently offline, so I’ll just assume I’m right and post a new question:
Q: The nefarious Fabian Stankowicz was better known (slightly) by another name. Who was he, what was his most infamous (or best known) deed, and who defeated him in this moment in the spotlight?
Did they actually fight the Surfer in 48? Or was the Surfer just there? IIRC the first “fight” between the FF and the Surfer was Thing knocking the Surfer off the roof of the Baxter Building. If that was in 48, maybe Bosda isn’t counting that as a “fight”?
The Mechano-Marauder. As for his most infamous deed, that’s pretty subjective. Are you thinking of his attack on Avengers Mansion while the Wasp was entertaining/recruiting female Avengers? Didn’t the Wasp defeat him by getting into his armor and stinging him or something?
I suppose I should ask a question now, even though I guess I haven’t actually gotten anyone else’s right yet. Name three wanna-be Spider-Man sidekicks who teamed up, and their former villainous connections.
Spectacular Spider-Kid (formerly a Doc Ock wanna-be)
Fabulous Frog-Man (whose father was the original villain Frog-Man)
The Toad (Brotherhood of Eeeevil Mutants)
Q: What did Hobgoblin add to his arsenal to help get around Spider-Man’s spider-sense (hint: it wasn’t a gas bomb)
Yeah, at the end of 48, the Surfer appears, zig-zags past the Human Torch, and lands on the Baxter building, where the Thing knocks him off and into Alicia Masters’ apartment. In the next issue, the Punisher shows up and defeats the Fantastic Four. The Punisher’s fight was arguably much more “fightlike,” I suppose, but the first punch was thrown at the Surfer by the Thing. Maybe it depends on whether you have to fight all four of them to be fighting “the Fantastic Four.”
That’s basically what I had in mind, with one addenum: the Surfer made no attempt to fight. He knew the Thing’s punch could not harm him significantly, & he just rolled with it.