I don't know much about Archanea, so idk if those games are male mage dominated
Jugdral has Sety the god.
Early game Kliff was pretty good in OG Gaiden, but the best mage was Sonya by far. In Echoes, the female mages have all gotten buffed and Kliff is now ass. Mage Tobin is around though.
FE6's best mage was like... Lugh. Niime doesn't really count I guess.
FE7 is a no brainer. Erk, Lucius, Canas, Pent, Athos...
FE8 has Saleh, but he's not that great on Ephraim route. I guess best mage would be Artur.
FE9 doesn't really have a clear best mage kinda? Perhaps Soren, but his start is as terrible as the other options.
RIP FE10 mages. Micaiah is "the best" I guess.
Robin can be male or female in FE13... Ricken is ass though, and Henry is just alright. Tharja and Miriel are nice.
Fates doesn't even have good Gen I mages... Ophelia is a goddess, but before that I guess... Nyx? Rev Hayato?