Name: Tamiyo
Race: Moon Elf
Classes: Bard (lore) / wizard (Divination)
Background: Scholar

Name: Karn
Race: Warforged
Classes: Cleric (Life) / Paladin (Oath of Redemption)
Background: Far Traveler

Name: Oko
Race: Changeling
Classes: Druid (Circle of Dreams)/Wizard (School of Enchantment)
Background: Charlatan

Name: Davriel
Race: Human
Classes: Rogue (Arcane Trickster) / Sorcerer (Shadow)
Background: Charlatan

Name: Daretti
Race: Goblin
Classes: Artificer (Artillerist) / Cleric (Forge)
Background: Scholar

Name: Ashiok
Race: Yuan-ti Pureblood
Classes: Druid (Circle of Dreams) / Wizard (Illusionary)
Background: Haunted One

Name: Angrath
Race: Minotaur
Classes: Rogue (Swashbuckler) / Fighter (Battlemaster)
Background: Soldier

Name: Vivien Reid
Race: Human
Classes: Ranger (Beastmaster) / Rogue (scout)
Background: Folk Hero?

Put other requests down below

Based on the prior post "Magic : the Gathering Planeswalker conversions for Dungeons & Dragons"

Quote from WarGamesCmm >>

 

Name: Angrath
Race: Minotaur
Classes: Rogue (Swashbuckler) / Fighter (Battlemaster)
Background: Soldier

 

 At least one class should be a spellcaster since all planeswalkers are mages of some kind.

Quote from WarGamesCmm >>

Name: Karn
Race: Warforged
Classes: Cleric (Life) / Paladin (Oath of Redemption)
Background: Far Traveler

 

 Personally I'd go Artificer (Either Battle Smith [with the iron and steel defenders fluffed to be Myrs] or Armorer [with full plate])/Cleric (Forge)

If you want I can add your to my master document.

Karn is definitely an artificer, probably a Battle Smith or Artillerist Artificer.