Captain Kirk vs. Han Solo

Kirk, easily.

In a fight? Kirk.

Assuming that Han didn't shoot first, Kirk would win.

He'd scream: "H-A-A-A-A-H-N!"

Then he'd put down Solo with his flying side kick. Then he'd unleash the sledgehammer on him... locking his fingers together so that he could deliver a two-handed blow to the back of his neck.

Somewhere in background, music would be playing: "du-du-DA-DA-DA-DA-DA-du-DA-DA-DA!"

He'd straighten up, adjust his tunic then look around for any alien chicks he could mack on.

Kirk of course, Han is a wimp, and plus no one can withstand those double-fisted punches and flying-jump-kicks that Kirk does and no one else in the Universe can do! Kirk also had better action music too!