How do you feel about infinite combos? I see a pretty close approximation of one with Sharuum the Hegemon, Sculpting Steel, and Sludge Strider. Basically, have Sculpting Steel enter as a copy of Sharuum, let the legend rule kick in, and throw the Steel into your graveyard. Steel-Sharuum's ability resolves, letting you bring back the Steel. Add an some ability that triggers on artifacts or creatures entering or dying, and you have a combo.

I kinda miss when Sharuum was THE combo commander to be feared, so it’s good to see! Thanks for the nostalgia kick!

Are you open to Sharuum being a wincon via combo? You already have Sculpting Steel, but I recommend also Phyrexian Metamorph and Disciple of the Vault, at least. You could even add some treasure token synergies for Disciple if you aren’t into the combos.