Over a long period of time Goku is most likely the strongest if Brolli aint alive
Goku can easily surpass Vegeta. Although he will never be ALOT stronger than Vegeta. Goku and Vegeta are most likely the 2 strongest characters in the entire dragonball series of all time. If Brolli were alive in the series then yes, I'm sure Brolli would over power everyone, because for 1, he was first char in the movies timeline who became a SSJ. Then along being the Legendary SSJ, which also just looks like an USSJ.
Over the longest period of time (Movie timeline)
Goku-
Kaioken x1 x4 x8? ++ (Movies 1-3)
1/2 Super Saiya-Jin (Lord Slug)
Super Saiya-Jin (Movies 5-7-Cooler's Revenge/Return of Cooler/Super Android 13/Legendary Super Saiya-Jin
Super Saiya-Jin 2 (The Dragon Fist Assault)
Super Saiya-Jin 3 (The Rebirth of Fusion:Goku and Vegeta!, The Dragon Fist Assault)
Vegeta-
Super Saiya-Jin (Return of Cooler)
Ascended Super Saiya-Jin (The Legendary Super Saiya-Jin)
Super Saiya-Jin 2 (The Rebirth of Fusion:Goku and Vegeta!, The Dragon Fist Assault)
Proves to this Goku is a fast progressor, and can pretty much out power anyone. Goku can take on ppl that are alot stronger than him. Goku is most likely the only character with the ability to do this, for some weird reason... Guess cause hes the main character....
Brolli-
Super Saiyan
Ultra Super Saiyan
Legendary Super Saiyan (Not really a stage)
Android 13( Don't know why you listed him)
... He obsorbs some chips, he is only seen in 1 movie. He is actually very weak.
Btw, You are a DBZ FREAK. You've made like polls on who is stronger, which is best, who is who... blah blah