Taven and Shujinko would also have resistance to all of the Netherrealm's effects, given the two were still fully capable of doing what they do best during their respective Konquests, also, yes, Taven should also have resistance to cold temperatures, dude casually ran through all of Arctika without mentioning once that he was cold.
Taven should also have possible resistance to electricity manipulation, he was completely fine after being tortured by Sektor, unless that counts as like, Low Regen or something.
Also, as for the Netherrealm Infinite in size thing, I just realized that it's part of the non canon Mortal Kombat: Conquest T.V series, and there would likely be a seperate profile as well that would probably never happen, so I guess we can assume The Netherrealm is the size of any other hell.
Edit: Possibly excluding Corruption for Shujinko, he had to taint his soul in order to enter The Netherrealm (IIRC Shujinko's soul got tainted because he was helping Onaga, this is pretty confusing when you think about it), and The Netherrealm can twist the essence of a being via affecting the soul, (which probably gives Taven resistance to soul manipulation), although, Shujinko
apparently spent several years in The Netherrealm, without coming out a vicious monster, I could be wrong and merely assuming this, though, it's been years since I've played Deception's Konquest, Shujinko did train several years in Earthrealm before leaving after all.