Originally Posted by CP3MVP
As a person, but he was a great fighter in his day. He killed Rhaegar Targaryen 1v1 in the trident. But I think Barristan in his prime was the best swordsman ever, even over Jaime. He's definitely one of three.
Eh...not so much in the realm of "best ever."
The name that always comes up in seriously revered tones is Ser Arthur Dayne, who wielded Dawn, The Sword of the Morning and was one of Mad King Aerys' Kingsguard.
Jaime AND Barristan both speak of Arthur Dayne with utmost reverence and consider him the finest swordsman they'd ever seen.