After doing some looking through of the partners in commander legends, i have come up with a small list of partner combos that range from fragile combos, to cEDH level concepts. In addition, I would love to hear what other combos you have found that i may have missed! here it is:
Toggo, goblin weaponsmith & Kodama of the East Tree: use the two triggers to dump all the land in your hand onto the field. likely too slow for competitive because of high cost on kodama, and limit because of limited number of lands in hand.