Caesar
Genghis Khan
Alexander The Great
Cao Cao
Sun Tzu
Bruce Lee
In one way or another, these names (and this is by no means anywhere close to being a comprehensive list) quite literally defined parts of the world we live in due to their mastery over martial concepts. In some cases, the things we believe; the things we think; our culture -even today- is defined by the history some of those names carved. ...and I'm only limiting my choices to real world history. If I start to consider literature, movies, and entertainment, names like Kull The Conqueror; Conan, Barristan Selmy, King Arthur, and various others come to mind. Heck, even D&D's lore itself has heroes who are known for their martial abilities; Drizzt Do'Urden, Sturm Brightblade, and Lord Soth were of great martial prowess.
(Though, admittedly, Soth doesn't exactly fit into my list since he was also a death knight; still he was a renowned knight already before gaining his other powers.)
None of them achieved greatness by personal martial skill but through their charisma and intelligence (military strategy). Of course history would be different if Caesar would have been able to fight off Brutus, but still its not his sword arm which made him famous. (And I don't see how Bruce Lee changed the world).
And you do not need to be a fighter to be a good tactician and/or politician.