Just gonna put up some things here for Thorgrim, if Thorgrim scaled directly to the 510 gigaton feat, the ap difference would be virtually meaningless, as it'd only be 1.5x difference, and that's completely disregarding that his armour and the throne both make him virtually indestructible, but that's only if he simply scaled to the 510 gigaton feat, which he doesn't, a bloodthirster achieves that level of power just as a byproduct of flapping their wings, not actually putting any force into an attack, and Thorgrim scales significantly above this by scaling to Ungrim Ironfist, so it's more likely that Thorgrim has an unknown ap advantage rather which gets slightly buffed further by the empathic manip of the Great Book of Grudges which causes him to hate whoever he is attacking, which only means it's going to be even HARDER for Oro to remotely hurt him.
As for skill, they are both massively skilled fighters in completely different ways so it's hard to justify who is more directly skilled, so for now I'd leave it as equal, though I personally believe Thorgrim has the advantage here.
As for hax, that basically gets completely covered by Thorgrim's resistances pretty handedly.
Oro obviously has range advantage with his projectiles, but it wouldn't be hard at all for Thorgrim to dodge, deflect, or straight up no sell most of those.
As for Stamina, Reaper i just realized...you didn't give him the scaling to Ungrim and the others...who can fight for several days to several weeks with no rest, so for now we'll leave that as a advantage for Oro via it not currently being on Thorgrim's profile but just keep in mind it should be and will be added later.
As for LS, he scales significantly above 1k, as he is quite a lot above Saurus warriors who performed the feat (warriors are quite literally nameless fodder to characters below thorgrim) however, I don't think it'd be enough to surpass Oros, it's closer obviously but i'd still give that to Oro. This is ofcourse ignoring his possibly class T LS which obviously is hilariously above Oro.
Tldr;
AP advantage: Thorgrim+
Durability: Thorgrim+++
Skill: both=/Thorgrim slightly
hax/resistances: Thorgrim++
range: Oro+ (nullified by Thorgrim's skill, resistances and durability)
Stamina: Oro+ (technically Thorgrim+)
LS: Oro++(Thorgrim++++ if Class T is used)
Personal verdict: Thorgrim is basically going to be forcing Oro into a fight, and can very easily take any damage Oro dishes out like nothing, and with their comparable skill levels, it's only a matter of time before he takes him out, especially as he used to fighting incredibly agile and skilled fighters on the regular, Oro's only proper win con is incap via grapple but that'd be incredibly dangerous for him as he basically has to come from the front to do it (as Thorgrim's throne basically protects his back for him) It doesn't help that Oro also starts at a disadvantage via binding his dominant arm, which does nothing but hamper him against a roughly equal skilled and stronger opponent)
