Because I feel like it at the moment, I'm going through the RotE spoiler. Here's the link.

Rise of the Eldrazi Visual Spoiler : Wizards of the Coast

I'm going to list my pics. If it's not on the list, there's probably better stuff already in the deck. I may post thoughts on some other cards along the way.

Colorless:
Emrakul, the Aeons Torn
0004 MTGROE EN LR
The deck is going to play at least one of the Eldrazi, that's a given. This is the one I vote for. This is the only Eldrazi that can dodge counter magic. With the mana investment on these guys, counter dodge is quite useful. Next, extra turn. Lastly, he may not be indestructible but he has protection from colored spells. How many non-colored removal spells are there? Exactly. (Thanks for the fix Jason)

The other eldrazi are all nice, but they fail in the various ways listed above. The only other one that could be considered on sheer awesome is It That Betrays.
0007 MTGROE EN LR
I just don't think it's good enough though.

White:
Deathless Angel
0017 MTGROE EN LR
Decent body, flies, great ability. Not an auto-include, but there may be a spot for it.

Linvala, Keeper of Silence
0033 MTGROE EN LR
For the cost, this is amazing. 3/4 flier for 2ww is pretty decent. The ability could be amazing.

Wall of Omens
0053 MTGROE EN LR
Wall of Blossoms rocks. Wall of Blossoms in white? Still rocks.