Suggested by Sonic Nick Fury recently became the Watcher of sorts and may have cosmic abilities but unfortunately for him we can’t really be sure of his abilities. For all we know he really can’t fight beyond his normal abilities. Baron Zemo would have the edge there with his sword skills. Fury would be on the back foot the entire time and ultimately their super soldier serums cancel out. Fury would just need some kind of boost to win this. Baron Zemo (12th) wins.
What a battle this would be, whether it gets put in the comics or not.
Definitely, both of these guys have a lot of experience and talent. They won’t go down easy