I used to read Archie comics all the time as a kid. The characters are quite simple, but they're also vivid and clearly-defined, so I think they can be typed. Here's my attempt:
Archie: IEE. People-oriented, forms relationships quickly but flexibly. Compare with Marty McFly.
Betty: ESE. Positive, nurturing, somewhat co-dependent.
Veronica: SEE. What Veronica wants, Veronica gets, and don't get in the way.
Interesting because Archie must choose between Quadra values: Fi relational loyalty, or Si comfort and relaxation? Benefit and Kindred don't seem like particularly attractive intertypes for a romantic relationship, but then again one of the perennial questions of Archie Comics is "What the heck do they see in him?"
Jughead: SEI. Food+Naps = SEI. Compare with "The Dude". Semi-Duality with Archie. I also considered ILE.
Reggie: EIE. Manipulates people for Se gain, eschews direct confrontation like Veronica or Moose.
Moose: SLE. Jealous overprotectiveness = Fi-PoLR insecurity?
Midge: IEI? Not much to go on here.
Dilton: LII. Possibly ILI, but ask yourself: would he be happy in a relationship with Veronica, or would he run for the hills?
Cheryl Blossom: SLE? EIE? I get a Beta vibe.
What do you folks think?