Spider-Man & His Amazing Friends- "Quest of the Red Skull"
A take-off on "Raiders of the Lost Ark" as the Spider-Friends and their new pal, Professor Hiawatha Smith, race the Red Skull to find a hidden vault of Nazi stuff. Even includes stuff like a special map piece and a location that is only revealed when the sun is at a certain point.
Pretty frickin' ridiculous, but it all goes by so fast that it's a fun ride.
The name "Hiawatha Smith" is an obvious rip-off of "Indiana Jones", but they give him some characterization. Like Indy, he's a college professor, but is sorta' like Ka-Zar meets Bloodstone out of the office. He has "all the ancient powers of his Indian people" and can seemingly hypnotize animals. He just runs around in jeans and white shirt, with his bow and boomerang...and he kinda' looks like Ricky Steamboat. This is Smith's first and ONLY appearance, anywhere in Marvel. I wouldn't call him "obscure", though, because this episode is pretty well-known.
The Nazi stuff is given an important role, as Smith shows the Spider-Friends an old newsreel about WWII. They're evil turds, so that's that. This would probably not make the airwaves, today. Especially considering how the big-screen Captain America movies have gone out of their way to specify that Hydra sorta' broke off from the Nazis.