Good artifact creatures for aristocrat

[Varatius]

So I am currently changing my sharuum deck from being a combo deck into a grind aristocrats deck and I was wondering if I could get help finding artifact creatures with solid etb and ltb effects to take advantage of.  There's the obvious baleful strict pilgrims eye and solmen simulacrum
My goal is to keep them it the 0-4 mana range as much as possible and thus I ruled out wurmcoil engine because of this.

[MonteTribal]

Perilous Myr
Arcanist's Owl / Faerie Mechanist
Filigree Familiar
Pilgrim's Eye / Skittering Surveyor
Sanctum Gargoyle
Skyscanner
Tidehollow Sculler
Ancestral Statue
Gleaming Barrier
Junk Diver
Myr Retriever
Treasure Keeper
Myr Moonvessel / Cathodion / Su-Chi

[Slyvester12]

If you have a good way to bounce or recur artifact creatures, Myr Battlesphere can close out games.