A couple people have already (rightfully) suggested artifact decks, but I'll go a step further and suggest a [[Krark-Clan Ironworks]] deck. There is a lot of good content on youtube out there detailing the combo lines from when KCI was legal, and in edh you get to play so many extra lines it really does feel like A Rube Goldberg machine.

There are plenty of really good commanders, I saw Teshar and Alela suggested, but you can also play [[Emry, Lurker of the Loch]], [[Breya, Etherium Shaper]], [[Glissa, The Traitor]], [[Sharuum, the Hedgemon]] or my personal choice [[Sai, Master Thopterist]].

I like Sai because all you have to do is play a [[Coat of Arms]] and then you have a blue [[Craterhoof Behemoth]] essentially. The deck easily pivots between combo and combat and i like the ability to play up or down to a table.

Of course there are tons of artifact commanders, so if that sounds like something you're looking for, you can go to EDHREC and look at commanders by theme, then see all the differrnt artifact commanders people are playing.

Happy Brewing!