Depends on the perspective. He is either listed as "a dark protagonist" by traditionalists or listed among one of the antagonists by those who view the play in a more modern way. He fits both roles depending on how you view the play as a whole and the narrative arcs they go through. The image leaves out how Prospero uses his powers on other characters and the lies he tells throughout the early acts.

It's one of the Late Plays, where it fits as neither a Comedy or a Tragedy archetype as with the other plays.