Ideas for Worlds and Servants given at entry:
Sinbad/magi not sure wich is the name with Ozymandias or Nitocris as one of the servants since it's one of the few manga with magic Arabian setting
Danmachi: can take more or less any hero related to divine in mythology, but i would go for good ol' Gilgamesh (male or fem if ya want that gal)
Naruto: in order to summon more jap heroes and go for Okita Souji or Miyamoto Musashi, it's hard to go for pseudo-medieval jap stories who are not just samurai stories where MC insta-win it. And there is a fackton of babes to invite in peerage too. (anko chan)
Rwby: same reasons as naruto world and for Servants either Mash or Davinci they fit in with their mecha-shift weapons mumbo jumbo or any Hero with animal part to pass as a Faunus ( Atalanta, Tamamo, astorias, Medusa,....)
Nanatsu No Taizai: what better than to infiltrate world based on arthurian legend than to do it with other revamped roud table fate persons?
Strike The Blood: Cute gals, a MC with summoning powas like yours, and overpowered familiars to take home for after in another world or just make your own set of familiars by ripping them off from every other fiction world and summon them in STB. Actually that anime kinda fit for one of your fanfic where ya shove a summoning based MC in it and watch it unfold and snatch koujo's gals, guy is managed to be more duller than Naruto and more seksually repressed than infinite stratos guy
I don't know if you've read these novels are good:
- mushuko tensei (isekai world that shows us a protagonist who reincarnates and embarks on a plot adventure of a gods, has a harem of 4 girls who have their own thing, they are to mention powerful characters).
-magika kenshi (protagonist who has his harem that is made up of the 72 demons of Salomon, where when he manages to make the love of the girls for the protagonist reach 100, he can use the powers of said demon, of course he has to conquer them first and make the contract by means of a ring, like an engagement).
-kaifuku jutsushi no yarinaoshi (from a protagonist who was abused and through artifact, he returns to the past to take revenge on all those who abused him, he has healing power, he can use it to heal, resist poisons and other poisons, he can erase memory, change their appearance, can strengthen those who **** them, etc).
- another would be anime:
* strike the blood.
* rosary + vampire.
* shinma mao no testament.
* mahouka no rettori.
Worlds.... [Sekirei get 03 Kazehana] [Full-metal Alchemist get Lust] [Akame ga Kill! get Esdeath] [Black Lagoon get Revey two hands] [Overlord get Albedo] Here you go and most are resonable as peerage members.....As for a Fate Servant I love, [Okita Sōji (Alter)]
Monkey_Godking