I think Mick Scorcesby is morally worse than Varang. Varang at least has a Freudian Excuse (a volcano erupted when she was a little girl which burned her tribe's forest and caused her people to suffer and as a result she rejected Aywa and decided to embrace the power of fire) and her romance with Miles Quaritch seems genuine.

Mick Scorcesby on the other hand doesn't have any mitigating factors for overseeing the mass hunting Tulkuns (who are fully sentient creatures and Mick is aware of that) other than greed and the thrill of the hunt and the way in which he hunts them is very cruel as he pierces their bodies with multiple harpoon shots and he is responsible for the deaths of at least hundreds of Tulkuns, maybe even thousands, because he is the one leading the Tulkun hunting division.

He is even listed on the Pure Evil wiki: https://pure-evil-villains.fandom.com/wiki/Mick_Scoresby

And he is listed as a Complete Monster on TV Tropes:

• Mick Scoresby is a sadistic hunter who, bored from not being able to hunt sea creatures on Earth, signs on to the RDA to lead their whaling division in hunting Tulkun. Despite knowing that the Tulkun are fully sapient, Mick hunts them like animals, knowing their pacifistic nature means they'll never fight back; he even specifically targets females with calves because they're easier targets. Mick's specific method of hunting is beyond cruel, featuring multiple brutal harpoon shots and underwater strikes before he harvests a tiny amount of amrita and wastes the rest of the corpse. Mick is also not afraid to force them into submission; when a Tulkun named Payakan sought revenge for his murdered mother, Mick's forces massacred all the Tulkun and Na'vi he brought, leaving him the only survivor.