2 Katilda, Dawnhart Prime Katilda, Dawnhart Prime, while a fantastic Human commander, is a must-run in any Human deck that can play Selesnya (green/white) colors
You'll definitely want to include several ways to remove her from combat or prevent damage so that she can safely swing before doing her best Cowardly Lion impression when something big blocks her
Minwu, White Mage While 5 mana for a 3/3 is a lot, Minwu is going to be welcome to all sorts of cleric typal decks like my All Denominations Clerics, as giving a whole team counter on buff is distinct from the gains we normally see on creatures like Aerith Gainsborough
Eight mana spells should finish the game, and Archon does a great approximation of that for players who prefer creatures to instants or sorceries
Thats usually worth the extra mana or life payment, though a pure card draw spell isnt that exciting these days