I don't know what you guys are arguing about, if you're going by feats without powerscale then Heracles is country level at best, one can be stronger at DC and weaker in durability, however it doesn't work like that in DBZ, the instances that shows DBZ chars being hurt by little things like rocks are obviously there for the additional effects, I don't see the logic Goku being 100,000,000x weaker ( Tanking a bullet ) getting hurt by a rock at SSJ, if you guys try to use that as evidence, you're obviously being desperate, in reality if you base on powerscale, I don't think Piccolo's special beam canon at 400 ( The one that busted the moon ) would even affect Nappa, neither do I see Vegeta's strongest attack at 18,000 ( Earth busting ) affecting someone in the million league, both of these guys on the battle has atleast planet level durability.
Piccolo busted the moon at 400, it makes sense for Vegeta at 18,000 to be able to atleast bust a planet the size of earth, and there is Goku's powerlevel sensing feat to back it up since he could tell if Vegeta was bluffing.
Both of these guys at namek saga are already above 1,000,000. Heracles gets obliterated in bloodlust, he may last a second longer without it. There's no proof that Vegeta and Piccolo can't breathe in space, I don't think there are oxygen in space pods.