MTG has many lifegain payoffs, especially in white
Sharuum the Hegemon You dont see Sharuum the Hegemon around nearly as much as you did in the early days of Commander, but dont let the 6-mana price tag fool you its still an incredibly formidable deck to play against
7 Emiel The Blessed Blink Blessings Similar to Duke Ulder Ravengard, Emiel the Blessed has a very strong ability to let you repeatedly get that Hare Apparent enter the battlefield trigger going over and over again
Young Blue Dragon ( ETB ) - An early overcosted sorcery speed Opt, followed by an overcosted 4 mana 3/3 dragon
The key feature of Tinybones, Bauble Burglar is that it's a cheap commander, meaning you can get it out early and then start the engine going when your opponents discard cards
Esika, God of the Tree / The Prismatic Bridge Like Kenrith, this is a good 5-color commander that you can use for your snow theme