Lets start with Emet-Selch of the Third Seat, a card you can build in various ways
While it may lose its Lightning Helix enters trigger, Phlage can dominate the battlefield on subsequent attacks
You can discard it to Mes ability to cast her from the graveyard, and then spend five mana to exile it from the graveyard to add four +1/+1 counters, a trample counter, a flying counter, a vigilance counter, and a lifelink counter on Me, which will go a long way towards making Me a game-ending threat
On pure rate I don't think Jace quite gets there, but if you're doing some serious graveyard stuff it's hard to imagine a better planeswalker for your deck
Theres 16 games were trying to cover here, and every game, people are like, Oh my gosh, this card from Final Fantasy 2 is in here
Its a Solgaleo GX card