I'm thinking you're just insane. I'm also not quite sure you understand the game or the ranking posted last page. Those numbers are taken directly from the game itself... When you're on the Character Select screen, you see little bars fill up for each stat. Lex clearly has 1 for Attack Speed.
Aside from that, Xigbar doesn't suck. He kicks serious ass against the Invisible and Orcus enemies. He keeps his distance, cuts off lots of health easily and has plenty of opportunities to reload without taking damage. I've used a few weapons with him and none of them compare to his Zero Gear weapon. ~.~ It has a nice ground combo of several quick chains of shots that go straight ahead (and home in on the targeted enemy) followed by a finisher which deals significantly more than the other shots (and homes in better than the other shots). His air combo is super duper epic, with four quick shots followed by a finisher during which he flips back, sometimes avoiding the enemy's attack. If that's not enough, he has a Y chain in his ground combo which allows him to fire at the ground (hitting close range enemies severely) before firing once long range as he flips far back, avoiding the attack that's coming at him.
*shrugs* You just need to know how to use him. Yeah, he functions much better as a Support Character and yeah, equipping Sliding Dash to him made me laugh a LOT when I went to attack and he dashed towards the Orcus and jumped into the air to attack right next to him, but he's really good if you use him correctly. Not to mention, even though he can't move while shooting, his combos are so quick that he can finish the combo and get out of there before taking any hits.
Also, since the stats of the secret characters weren't included in that list...
Mickey
Max HP: 3
Strength: 5
Defense: 4
Magic: 8
Attack Speed: 5
Critical Rate: 8
Crit Bonus: 7
Sora and Xion are all 5
Goofy
Max HP: 6
Strength: 5
Defense: 8
Magic: 1
Attack Speed: 5
Critical Rate: 4
Crit Bonus: 5
Donald
Max HP: 1
Strength: 1
Defense: 1
Magic: 10
Attack Speed: 4
Critical Rate: 4
Crit Bonus: 3
Riku
Max HP: 6
Strength: 5
Defense: 5
Magic: 3
Attack Speed: 5
Critical Rate: 6
Crit Bonus: 8