Magnus don't be offended but your namesake from 4 was overthrown because of an inflated ego...

I know:( . But in Might and Magic 7 he was a master of light magic
And there is also Magnus in The Elder Scrolls game, known as the creator of Nirn
The sun of Nirn is Magnus, the largest hole in Oblivion; it serves as a gateway to magic. Magnus was present during the creation of the mortal plane of existence and was its creator (Lorkhan, on the other hand, was the inspiration). Prehistoric (before ME2500) Nirn was a magical place and more than unstable for the first mortals. Then Magnus left it, some say in disgust, and Oblivion was filled with the Void. Magnus's departure was not simple; parts of him remained in the form of stars