I am not sure what the requisites are for the Great Longsword, but I just wanted to make sure you realize that during character creation, you can move stat points between your attributes. So, if you are rolling a fighter, and you get a 16 in STR, and a 16 in wisdom, or any attribute that is not important to a fighter, you can reduce your wisdom by 2 and place those stat points into STR, giving you a fighter with 18 STR, specializing him in his chosen field (especially since WIS is not a prime characteristic of a fighter)
"I moved all my intelligence points to charisma, so I would appeal to the ladies, but now I am too dumb to carry on a conversation with them, duh!"
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Thanatos (Dispositioner of Souls)