Here are my choices:
3. Samurai Shodown
2. Shin Oh Ken
1. Magician Lord, of course!
Actually, number 1 is World Heroes 2! Nothing was ever so short, sweet, colourful, masterfully scored, and able to get my blood boiling for a fight! That's an intro I always sit through, no matter what. So many other great ones though, like MIE, FF3, NBM, Pulstar & Blazing Star, and so on.