I thought I'd try to avoid being monotonous.
My ranking:
1. Cobra
2. Sultan
3. Vizier
4. Genie
5. Old Beggar
6. Sorcerer
Yes, the Sultan outfit is briefly used (it's white whereas Jasmine's father's is yellow). I thought about that when I made the poll actually, but I'm not sure how they could've altered the film for it to be used longer. Jafar needs sorcery to reveal Aladdin and then banish him to the ends of the earth, so he couldn't wear the sultan outfit and wish to be a sorcerer in the climax after Aladdin returns, I suppose. Still, I always liked how the white complements all the black lines of his face (eyeshows, lashes, beard) and the dark shadow.