Fantasy has a number of good examples of positive masculinity. Tam al’Thor, Thom Merrilin, Loail, and others in Wheel of Time are all good examples, though that series has its own issues with gender (author had little LGBT rep even though he accidentally wrote a great trans allegory, and has stated in interviews he accidentally wrote all the women to be his wife), Storm light Archive has Numuhukumakiaki’aialunamor, Ninth Tomb has Palamedes, and Dungeon Meshi has Senshi

Modern fantasy is kind of spoiled for choice in that regard.