And don't forget Goldeen. But on a more serious note, Pit is the most powerful currently. He has a good MU against 90% of the cast including the other "OP" characters like Mewtwo, Link, and Zelda. It's like you gave a Jigglypuff a sword, a bow, magical bendy arrows, and the ability to glide.
Back on thread topic, though. In my opinion, Roy is like absolute mid tier (almost perfectly balanced). He has great combo ability if you can get in, good kill power if you can manage to land the hit out of a combo at higher percents, but a mediocre recovery to balance it all out.