Brook berringer had a chance in the NFL as well. I put him in my top ten as well. Good thrower, tall and good runner. good leader.
Dave Humm was the best 'pure passer' but was not a runner at all. Pocket guy. Beautiful spiral balls that were very very catchable and he could throw all the throws with zip or touch, short medium or long. Long NFL career backing up one of the all time greats.
Steve Taylor was very smooth and a good thrower and fine runner. Good leader, confident and careful. He makes the top ten as well.
Zac Taylor also in the top ten I would think.
Keithen McCant was the most unappreciated (think of him as a 'lost boy') QBs. If he would have had a couple seasons with some back up play time before his one year as a starter, he could have been a star. Tall, nice arm, intelligent, good runner, etc.