If Vegeta got his tail back and went Oozaru against Freeza, that’d definitely be epic! I feel like it’d give him a solid edge, especially against Freeza's 1st and 2nd forms, since Oozaru’s power boost would force Freeza to take him a lot more seriously early on. It could've even led to a few surprises in the battle, making Freeza jump straight to his 3rd form faster. But honestly, once Freeza’s in his 4th form, I think it’s game over, even with Oozaru’s power. Vegeta would put up an awesome fight, but Freeza’s just too overpowered at that point.