More specific to dance:
* Choreographer
* Ballerina/Danseur (for ballet dancers)
* Hoofer (for tap dancers)
* Flamenco dancer
* Salsa dancer
* Breakdancer
* Contemporary dancer
General terms for performer:
* Entertainer
* Artist
* Showman/Showwoman
* Actor
* Musician
* Singer
* Acrobatic performer
* Mime
* Magician
More informal:
* Mover and shaker
* Stagehand
* Thespian (for actors)
* Troubadour
* Minstrel
More poetic:
* Muse
* Sprite
* Sylph
* Nymph
* Siren
The best word to use will depend on the specific context and the type of performance you are referring to.