While Im not going to say you should pass a Wurmcoil Engine or a Steel Hellkite in favor of a Gray Ogre, youre going to have to pass a lot of really good creatures and spells to get a good infect deck
For example, Heatran from Triumphant Light has an ability that causes 40 extra damage when Heatran receives (any) damage
Sapphire has some great items, including several new cards in the next set such as Aurelian Gyrosensor and Lucky Dime, and Scrooge McDuck, Richest Duck in the World can allow you to play these without paying a single ink
With a powerful HP of 260, Leafeon VSTAR is a formidable addition to any deck
Finally, Ive employed the help of EDHREC to give me some numbers, just like I did with my underrated cards list
Also I apparently can't make an archetype without giving them a field spell