Yorion, Sky Nomad Cloud Surfing [Revision 14]

Finally cut this list down to size!
More in-depth description to come, but for now:

Strategy: Overwhelm opponents by banking the ETB value from the creatures until Yorion, Sky Nomad can set up more explosive ETB value chains, and keep it going hoping it pays off toward a win.

Win conditions: Assemble the army of bodies once their ETB abilities have been exploited to smash in. Specifically:

1. Compile a combo for infinite tokens (explained below) and swing for the win if no board wipes; OR
2. Venser, the Sojourner to make everything unblockable for an alpha strike; OR
3. Keep a Cathars' Crusade down as a mass of creatures re-enter the field and become immense to hit hard; OR
4. Old fashioned beats with the bigger creatures as many of them have flying evasion

Infinite combos included, of which I'm considering including Whirler Rogue, Experimental Aviator, and Geist-Honored Monk to make more consistent:

Clever Impersonator + Wispweaver Angel / Felidar Guardian + Ajani's Welcome / Angelic Chorus = infinite ETB and life gain

Reveillark + Karmic Guide + any creature with power 2 or less that creates 2 or more tokens on ETB such as Whirler Rogue / Experimental Aviator / Geist-Honored Monk + Ashnod's Altar = infinite ETB and tokens

Nim Deathmantle + Ashnod's Altar + any creature that creates 2 or more tokens on ETB such as Myr Battlesphere / Whirler Rogue / Experimental Aviator / Geist-Honored Monk = infinite ETB and tokens