Bret Hart's book had a system, 1) physical presence/look, 2) in-ring ability, and 3)talking/selling/promoting yourself. He said if you rank guys from 1-10, guys in the high twenties usually turn out to be great wrestlers, while shitty guys (he specifically calls out Dino Bravo) don't have many. He gives himself in the early 90s a pretty fair score: 7 Look (he had a good physique and was in shape, though I'd argue this might be too low), 10 Skill & 4 Charisma, adding up to a 21. Hulk Hogan scored a little better, being 10 Look, 3 Skill and 10 Charisma (if I recall correctly).
I thought they was ok. I mean, you got Dusty Rhodes who never looked great, but that mothafucka oozed charisma and had enough skill to get by. Peak-Kurt Angle in early 2000s or prime-Randy Savage was like the total package. You can alter looks and skills, but you can't teach charisma.