The Best there is, the best that there ever was.
Honestly after testing them all, this is what It came down to. Majins and Humans have an EXTREMELY overpowered start game and a solid end game. Frost Demons AKA: Arcosians, have a mid start game and amazing end game. Saiyans are honestly mid, and Namekians would be good if it wasn't for passive.
Credit to https://trello.com/b/NNxHnGuI/dbfr-trello for the images.
