I'm sorry I wasn't specific. I was trying to tell you to use characters like those:
1) Overlord: Ains Ooal Gown (Necromancer and Sorcerer King, overpowered character), Albedo (overseer of Ains' subjects, second-in-command), Shalltear (formidable vampire), Sebas (Butler and overpowered fighter), Cocytus (powerful warrior), Demiurge (tactician and formidable fighter on his own), Aura and Mare (minor guardians who provide provide moral support), Hamsuke (gigantic familiar of Ains)
2) Konosuba: Kazuma Satou (not a strong fighter, but depended on the skill of luck and steal; kind like the rogue's role from the Dungeon and Dragon campaigns), Darkness (formidable knight and soldier with masohistic tendecies), Megumin (spellcaster focused only "Explonsion" spell), and Aqua (minor goddess who provide moral support), Vanir (Demon lord and suave trade dealer, former antagonist turned supporting character; he can summon explosive dolls), Hans (Demon lord and shapeshift slime, formidable demon)
3) Re:Zero Starting a Life in Another World: Subaru Natsuki (not a strong fighter, but he can return to a safe point after being killed; kind like a checkpoint in videogames), Rem (maid with demonic tendecies) Ram (sister of Rem who provide moral support), Emilia (A minor princess who provide moral support), Puck (Emilia's familiar, it can transform to a demonc beast at times), Reinhard (Royal knight, stronger than any character in the series, forbidable and near invisible fighter), Julius (Royal knight, formidable fighter), Betelguese (one of the antagonists, can transform into a supernatural monster)
I hope that helps.