I recommend putting the following heroes on your wishlist:

Lightbearer

• Vala

  • 'Energy Drain' & 'Execute' Mechanics (<50%)

  • Strong in early game PvE, PvP, Dream Realm, & Battle Drill

• Rowan

  • Healing & Energy Battery Mechanics

  • Strong early game PvE

  • Grab 1 copy of him replace with 'Temesia'

• Korin

  • 'True Damage', shielding

  • Strong in Dream Realm, & Battle Drill

• Marilee

  • 'True Damage'

  • Strong in late game Dream Realm & Battle Drill

Mauler

• Smokey

  • Healing, Damage (M+), & Buffing (Haste)

  • Strong early game PvE, Dream Realm, & Battle Drill

• Brutus

  • Invulnerability Tank

  • Strong in PvE

  • After 1 copy, either leave on or swap to Shakir

• Odie

  • Magic Damage, 'Execute' Mechanics

  • Strong in PvE, PvP, Dream Realm, & Battle Drill

• Kokko

  • 'Damage Reduction' Mechanics

  • Strong in PvE, PvP, Dream Realm, & Battle Drill

After working through those heroes to S+, I recommend to put the following heroes on your Wishlist next:

Lightbearer

• Cassadee

  • Normal Attack Buffing

  • Strong in Dream Realm, & Battle Drill

• Walker

  • DPS

  • Strong in PvP & Battle Drill

Mauler

• Rhys

  • AoE DPS

  • Strong in Battle Drill

• Kruger

  • Debuff Mechanics

  • Strong in Dream Realm, & Battle Drill

• Antandra

  • Fatal Death Save, Shielding, & 'Damage Reduction' Mechanics

  • Strong in PvE & PvP

Wilder

• Granny

  • Healing, Shielding, & 'Damage Reduction' Mechanics

  • Strong in PvE & PvP

• Parisa

  • AoE DPS

  • Strong in PvP & Battle Drill

• Lyca 

  • Shield Break & Buffing (Haste / Attack Speed)

  • PvE & PvP viability

Graveborn

• Carolina

  • 'Crowd Control' (CC) & AoE DPS

  • Strong in PvE, PvP, & Battle Drill

• Igor

  • Fatal Death Saves, Survival Mechanics

  • Strong in PvE, PvP, & Battle Drill

• Niru

  • Invulneriblity Mechanics

  • Strong in PvP & Battle Drill

Ref.

Tier List - Analytica

Beginner's Guide - Insider Chippy (VatrA)

Wishlist Tips - Prydwen

Wishlist VoD - Zeeebo

Wishlist VoD - DangerGrey