mellored
Legend
You have Str/Wis/Dex/Int covered, Cha is missing. (sorcerer, paladin, warlock, bard)
You also have 3 casters so you don't need utility or AoE, though some emergency healing would be good to have if your cleric drops. (paladin, bard, druid, ranger)
You also have a lot of melee and tankiness, so ranged damage would be good. (warlock, ranger, sorcererer)
Overall I would go with variant human (inspiring leader) paladin X/tome warlock 3 (shillelagh, eldritch blast + agonizing blast).
You also have 3 casters so you don't need utility or AoE, though some emergency healing would be good to have if your cleric drops. (paladin, bard, druid, ranger)
You also have a lot of melee and tankiness, so ranged damage would be good. (warlock, ranger, sorcererer)
Overall I would go with variant human (inspiring leader) paladin X/tome warlock 3 (shillelagh, eldritch blast + agonizing blast).