I'll go with my favourite Bleach character; Kenpachi Zaraki, simply because he despises using skills and techniques in battle. Kenpachi, has a barbaric way of fighting, not paying attention to his wounds ignoring it, giving his all when he finds a worthy opponent. Not to mention that he always fights with one hand free, only using both hands as a last resort. So in short, it's because of his barbaric way of fighting, he fights as he wants to. My oppinion is that he IS the best swordsman when comparing to the others in the list.