Part of the fun in watching "Magnificent Seven" and "The Great Escape" is seeing the early acting careers of Coburn, McQueen, and Bronson, possibley about half of the All-Time action/tough guy lineup (the other half was in "Cool Hand Luke"?). Coburn was incredibly skinny as a young man, filled out a bit (like Jimmy Stewart) to look better/cooler as an older man. Coburn "outdrawing" the other guy with a switchblade in M7 was super cool. He was also devious/cool in "Charade" w similarly unknown (at the time) way cool George Kennedy.

I should say that another "The Great Escape" bonus for me was knowing my father (B24 copilot) was in that very same prison camp.

https://scottvern.medium.com/a-world-war-ii-bomber-pilots-crash-and-tale-of-survival-ccfce7103ac

I often joke that he was the Steve McQueen character (having an American implicated in the escape was a kind of fiction, actually, since the countries were separated...we visited the camp in 2019, I highly recommend). My father's war story (and others) often talk about the beloved guard "Popeye", who may have been the model for Sgt Schultz.