The topic came up in a discord server and when I looked into it, there wasn't one here comparing the two. I'm inclined to lean towards Bret, but that's more a case of me not having dug as deeply into Steamboat's career.

I'm in the minority I'm sure, but Steamboat.

Bret as a character did better work outside the ring as a heel than Steamboat ever did in any role outside the ring, but Steamboat in the ring sold the match so well. I'm particularly partial to guys who sell the match, sell the drama throughout, sell the struggle, etc. Bret IS good at those things, but Steamboat is near the top all time at those things to me.