The Saibamen are canonically as strong as Raditz, power level 1200. Plus, everyone always forgets this, but Yamcha actually beat that Saibaman initially - he just didn't kill it, allowing it to surprise him and self destruct. So Yamcha is, at the very least, on the level of an average Saiyan warrior after his training with Mr Popo.
The normal human power rankings are something like Roshi > Tien > Krillin > Yamcha > Videl > Chi-Chi > Hercule > Everyone Else
In Dragon Ball Super Roshi gets back on training and levels up to be on par with the strongest fighters from other universes, which is why I ranked him there. During Z he's totally rusty and can't even hang with Dr Wheelo's goons - although he is stated to be immortal, and that counts for something.
The Saibamen are canonically as strong as Raditz, power level 1200. Plus, everyone always forgets this, but Yamcha actually beat that Saibaman initially - he just didn't kill it, allowing it to surprise him and self destruct. So Yamcha is, at the very least, on the level of an average Saiyan warrior after his training with Mr Popo.
The normal human power rankings are something like Roshi > Tien > Krillin > Yamcha > Videl > Chi-Chi > Hercule > Everyone Else
Hercule > Everyone Else
Hah! That means there are still billions of Earthlings weaker than him!
Now if only they'd let Tien do anything cool again
No way Roshi is stronger than those guys after they trained with King Kai
In Dragon Ball Super Roshi gets back on training and levels up to be on par with the strongest fighters from other universes, which is why I ranked him there. During Z he's totally rusty and can't even hang with Dr Wheelo's goons - although he is stated to be immortal, and that counts for something.
Post Tournament of Power training, maybe. That def skews it; 'cause now Roshi is the closest human to UI