Typically the colours that don't involve green need the most ramp, like blue, red and white. So Marchesa needs Solemn Simulacrums and Burnished Hart-type cards that you can get multi-use out of. Green can do it with bodies moreso, however I like cards like Harrow, Primal Growth personally in my more tuned builds, because you get them untapped.
(W/U)(B/R)GForm of Progenitus, Shape of a Scrubland
BRGJund Tokens with Prossh, the Magic Dragon Foil
URGAnimar, the RUG CleanerFoil
RRRFeldon of the Third Path 2.0 Foil
BG(B/G)Not Another Meren DeckFoil
UR(U/R)Mizzix, Y Control and X Burn Spells
(W/U)(B/R)GHarold Ramos - The 35 Foot Long Twinkie (In +1/+1 counters)
UB(U/B)Dragonlord Silumgar