So I’ve been DMing a game and a group right now is becoming very important to the plot(they’re not taking it over just being important). So while making the characters for it I’ve got some ideas but I thought, hay what if I tried getting ideas from other DM’s for characters. So here I am now expanding the ideas by asking my fellow DM’s. 

Backstory of the group

The group is called Argen’s steel, the group is disbanded but the current plot is bringing them back into the equation, basically they did do jobs and stuff like that until they did something really stupid and attempted to loot a king’s castle, long story short they started a war and disbanded. The current members I have as follows, 

Patch the Tabaxi rouge(yes she is being played in a campaign I’m doing but I like the character) she is devious person, her skills at lock picking only matched by her curious and odd ways. She is usually playful but cunning all the same. 

Vos, the half elf(Drow) Paladin- Vos is probably one of the most devoted people you’ll meet, he swears by code of loyalty to those he trusts and the causes he fights for.

Greg human sorcerer- Greg is an has impressive abilities with his inmate magic only rivaled by his cowardly nature. Greg has retired and really isn’t all that interested in joining back with the team

Gregor the arrakora wrestler Barbarian- leaving mercenary business he decided to pick up underground fighting with some crazy fighting techniques

Davis- Fighter/Archer- The look out for the group with his bow and minor arcana skills ay work he was a great bow

so what ideas do you have offer (I have worked out these characters in more detail and backstory but I don’t feel like typing it all out right now, so what ideas do you have 

I'm not really sure what it is you are asking for in the way of help or advice. Is there a question in there somewhere? What, specifically are you asking for?

Ideas for characters that fit into this kind of ground 

Is this a party of players and you are looking for an NPC of some kind or is this some sort of Guild or Secret Society thing and you are looking for characters that would belong to such a group?

I’m looking for NPC’s to be part of the group mentioned above, and it’s not as much a guild as it is some people coming together to do jobs since they need funds 

Well right now you've got a Rogue, a Paladin, a Sorcerer, a Barbarian, and a ranged Fighter. Overall this seems like a balanced enough party, though if you feel you had to, you might want to team them up with an Acolyte or something to take the healing pressure off of your paladin player.

What no that’s the group of NPC’S I’m looking for ideas of characters I could add to this group, the party is currently working with them

Any group of players would do. It might be good if there were no class overlaps, but it might also be fun to have one of the players be the same class and "apprenticing" under these NPCs. But yeah, I'd just see what your players want to make and go from there.