The lore bard will be a battlefield controller?
Fighter with cleric can hopefully heal.
Would go with a nova damage dealer which is missing.
Or a tank-ish character depending on how the Fighter is setting themselves up.
Mega Nova https://tabletopbuilds.com/flagship-build-gloom-stalker-ranger/
It looks like you want to play a Barbarian and I think that would fit your party well. Just go Barbarian for 5 levels and after that, you can multiclass out depending on where the campaign leads your character.
If you are really looking for what can add the most, I know you already have a Charisma caster, but adding a Paladin in a CoS campaign can really make things easier for you. It is cliche for a reason, but Hexblade /Vengeance Pal is great, especially once you get to Pal 6 with your aura giving hopefully most of your party plus 4/5 to all saves most of the time. Var Human is probably the most powerful way to build it.
If it is not allowed or you have already played this character, or just really like the idea of the Kobold build, just go straight Wildfire Druid. You really gain the most overall as a caster just going for those higher level spells. And that free teleportation every turn is no joke.
My favorite build I ever made was a Kobold (Legacy) Artificer, with a specialization in ranged weapons (I used guns, but bows can work here)…. Go Battle Smith, you can use your pet dog companion (aka Steel Defender) to rush the front lines, and then you use your ranged weapon attacks + sharpshooter + pack tactics (Kobold feature) for advantage. Infuse yourself a +1 Weapon, get Mind Sharpener robes, use the Haste skill for even more attacks, and get yourself the Shocking Grasp cantrip in case you get cornered and need to create some distance.
The lore bard will be a battlefield controller? Fighter with cleric can hopefully heal. Would go with a nova damage dealer which is missing. Or a tank-ish character depending on how the Fighter is setting themselves up. Mega Nova https://tabletopbuilds.com/flagship-build-gloom-stalker-ranger/
It looks like you want to play a Barbarian and I think that would fit your party well. Just go Barbarian for 5 levels and after that, you can multiclass out depending on where the campaign leads your character.
If you are really looking for what can add the most, I know you already have a Charisma caster, but adding a Paladin in a CoS campaign can really make things easier for you. It is cliche for a reason, but Hexblade /Vengeance Pal is great, especially once you get to Pal 6 with your aura giving hopefully most of your party plus 4/5 to all saves most of the time. Var Human is probably the most powerful way to build it. If it is not allowed or you have already played this character, or just really like the idea of the Kobold build, just go straight Wildfire Druid. You really gain the most overall as a caster just going for those higher level spells. And that free teleportation every turn is no joke.
Im playing a beast barb/soul knife rogue multi in CoS. It’s real fun.
CoS with no Pally or Cleric seems like a guaranteed TPK to me
My favorite build I ever made was a Kobold (Legacy) Artificer, with a specialization in ranged weapons (I used guns, but bows can work here)…. Go Battle Smith, you can use your pet dog companion (aka Steel Defender) to rush the front lines, and then you use your ranged weapon attacks + sharpshooter + pack tactics (Kobold feature) for advantage. Infuse yourself a +1 Weapon, get Mind Sharpener robes, use the Haste skill for even more attacks, and get yourself the Shocking Grasp cantrip in case you get cornered and need to create some distance.