Code Geass: Hangyaku no Lelouch, Overlord Recommendations
The genre of MMORPG in anime is still very new. In respect of similarity, it would be the protagonists whom both possesses their alter ego. The dominating presence, strength, wisdom, does not waver to kill and sacrifice for the sake of achieving their goals. They are both their world's changer.
Both main characters are trying to make the world a better place.
There is political and territorial tension in both series.
Both MC are seen as evil by others.
Both MC have a light god complex. (see what I did there.)