[No Green Spandex]

This is going to surprise most people. But I am going to say Green Ranger Tommy was better. He was the one that put Sixth Rangers on the map. His storyline made MMPR. If you want vunerable, look at his power loss storyline. His story would have been perfect if it wasn't for the White Ranger arch. "Green No More" should have been it. It was after that when Tommy became unbearable and damaging to the rest of the series.