Interesting that you first say “multi-national champ OR 3-4x All-American,” but then narrow your question about world and Olympic medals to only those that “did not win multiple national championships.”
Because I’m pretty sure if you change the question to those that “were not 3-4x All-Americans,” the list is pretty short. I’m no freestyle expert, but in the last decade or so I can’t think of any besides Joe Colon, and Tervel if you go back another year.
Which goes to my point, if you want to win a world medal, you probably need to be able to start for Penn State.