Kirk and Sisko are the only two real choices here. Picard's more of a diplomat and Janeway 'Follows her gut'.
I'm surprised Sisko is beating Kirk in the war though. Sisko is good at war strategy, but he's not as much as a tactician. Strategy and tactics are two different things. Strategy is your overall approach to a large struggle, and tactics are specific maneuvers. The DS9 writers didn't focus as much on tactics as the TOS writers, there was nothing like The Corbomite Maneuver or Balance of Terror where Sisko has to take into account all the specifics of how an enemy might be thinking to trick them into making bad decisions.
Sisko is the best strategist, Kirk is the best tactician.
Picard is the best diplomat, Janeway is the best prison cook.