Best free summons?

[Alex]

I need 1 more free summon for a tribute deck, I have 1 rock vasall and 2 eidos quire already.

[1WingedAngel]

Dynatherium and Gilasaurus can be special summoned from the hand, but be mindful of the GY's as they allow your opponent to summon as well. The Tricky can be summoned by discarding one card, plus there's loads of monsters that are a free summon if your opponent already controls a monster i.e. Cyber Dragon, Evilswarm mandragora, unknown synchron etc.

[Satanyonok]

Dynatherium, Gilasaurus, Mithra the Thunder Vassal, Evilswarm Mandragora, Elder of the Six Samurai, Earth Armor Ninja, Cockadoodledoo, Junk Forward. Maybe Spell Striker and Arrivalrivals will come in handy too. Oh, and Double Summon. And maybe Alector, Sovereign of Birds.

[Shark]

Mahad i guess decent stats and special summons himself when you draw him without any drawbacks. Although hes a UR and not sure if you wanna dig for him just as tribute fodder.