Updated for the June 4th balance changes.
Diablo 4 Barbarian

Rend Leveling Barbarian

Exp:
2h Axe
Lunging Strike
Rend
Death Blow
Rallying Cry
War Cry
Call of the Ancients
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Rob2628
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Diablo 4 Sorcerer

Chain Lightning Leveling Sorcerer

Ench:
Fireball
Chain Lightning
Arc Lash
Chain Lightning
Unstable Currents
Frost Nova
Ice Armor
Teleport
Diablo 4 Sorcerer

Firewall Leveling Sorcerer

Ench:
Firewall
Fireball
Fire Bolt
Firewall
Hydra
Inferno
Ice Armor
Teleport
Diablo 4 Rogue

Flurry Leveling Rogue

Spec:
Combo Points
Puncture
Flurry
Poison Trap
Poison Imbuement
Dark Shroud
Shadow Step
Diablo 4 Sorcerer

Freeze Leveling Sorcerer

Ench:
Ice Shards
Fire Bolt
Frost Bolt
Ice Shards
Inferno
Frost Nova
Ice Armor
Teleport
Diablo 4 Barbarian

HotA Leveling Barbarian

Exp:
2h Sword
Lunging Strike
Hammer of the Ancients
Death Blow
Rallying Cry
War Cry
Call of the Ancients
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Rob2628
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Diablo 4 Druid

Landslide Leveling Druid

Storm Strike
Landslide
Poison Creeper
Wolves
Ravens
Earthen Bulwark
Diablo 4 Necromancer

Minion Bone Spear Leveling Necromancer

Bone Splinters
Bone Spear
Corpse Tendrils
Army of the Dead
Raise Skeleton
Golem
Diablo 4 Rogue

Penetrating Shot Rogue

Spec:
Combo Points
Puncture
Penetrating Shot
Shadow Imbuement
Poison Imbuement
Dark Shroud
Shadow Step
Diablo 4 Rogue

Poison Twisting Blades Leveling Rogue

Spec:
Inner Sight
Puncture
Twisting Blades
Poison Trap
Dark Shroud
Shadow Step
Dash
Diablo 4 Druid

Pulverize Leveling Druid

Storm Strike
Pulverize
Poison Creeper
Trample
Blood Howl
Earthen Bulwark
Diablo 4 Necromancer

Sacrifice Bone Spear Leveling Necromancer

Bone Splinters
Bone Spear
Corpse Explosion
Corpse Tendrils
Bone Storm
Blood Mist
Diablo 4 Rogue

Shadow Twisting Blades Leveling Rogue

Spec:
Inner Sight
Puncture
Twisting Blades
Shadow Imbuement
Shadow Clone
Shadow Step
Dash
Diablo 4 Barbarian

WW Leveling Barbarian

Exp:
2h Axe
Lunging Strike
Whirlwind
Rallying Cry
War Cry
Wrath of the Berserker
Leap