Then my answer is yes. Jalhalla can make a better guide than KG. But if you ask it in a story setting like LA, OOT, MM, WW, OOA and OOS, then the answer is no. In a story like TP, PH, and ST, then the answer is yes.
But the fact is that the topic title contains "in Spirit Mythes" and also he gives an example of a capability he uses him in a game. Thus I think that he wants to use him in a game that he is developing. And like I said it depends a bit on the game's story and mood to judge if he is fitting.