I particularly love Kogla, the Titan Ape here, since Koglas indestructible ability can be used in conjunction with Samut to save your commander from removal
Saruman, the White Hand makes a pretty big creature when you cast planeswalkers, letting you trade with bigger things and immediately replace it
(6/16/2023) If Frodo Baggins is your Ring-bearer but each creature the defending player controls can't block for any reason (such as by having greater power than Frodo along with the first ability of the Ring emblem), then Frodo Baggins isn't blocked
It's a bit convoluted yet a card that's in decent colors for +1/+1 counter synergy
Teferi, Time Raveler, proved long ago how strong an effect like this can be
(2/2/2024) Exiling a card with suspend isn't casting that card