So I have been thinking and wondering. How many Maiar lived in middle- earth for each age. The third age at the time of the WOTR appears to have the five Istari, the balrog, and Sauron for a total of 7. Am I missing any? So how does that compare to the earlier ages. I am not looking for valar or maiar that reside outside of middle earth such as in valinor. But those like melian who lived for a time in ME.