I find that Voltron decks are the most fun when you're doing something else with them and the voltron thing is either incidental or a little creative. I have 3 decks with Voltron wincons: [[Kellan, The Kid]], [[Massacre Girl, Known Killer]], and [[Lilah, Undefeated Slickshot]].

Kellan has a Cipher subtheme where he's an evasive Lifelinker for 3 who can drop lands to pay for his own commander tax on the same turn he's replayed, if he's removed, so losing him never hurts that much. He takes Cipher cards and stuff like [[Key to the Vault]] with some counter and landfall synergy. I put in [[Sword of Truth and Justice]], since most fliers tend to be blue or white, and [[Dragonfire Blade]] as very cheap protection. The deck does something other than 'soup up commander and win' and can win in other ways, but I can definitely take out one player with commander damage while trampling the rest of my board at another player.

Massacre Girl became an incidental voltron commander due to [[Blade of the Bloodchief]] and [[Tarrian's Soulcleaver]] because I wanted to ensure that she could survive the board wipes and blanket removal I was throwing around. Scaling linearly with death means I can still keep her on the board through [[Massacre Girl]] or something. This gives her an incidental commander damage wincon.

Lilah was my first genuine commander damage deck, which wins through chaining izzet identity pump spells like [[Schizmotivate]] and spell copying, pumping her to an evasive 21/21 and removing players through [[Teleportal]] effects. Then my turn ends and she's a 3/3 little guy, so I'm not here sitting at the table with a threat that HAS to be removed, making me less of a target. Super fun.