Three are Esper (white, blue, and black), one is Grixis (blue, black, and red), one is Jund (black, red, and green), three are Mardu (white, black, and red), one is Abzan (white, black, and green), two are Sultai (blue, black, and green), and one uses all five colours.
Honorable Mentions In terms of non-foil, non-alternate art, new-to-the-game cards, those I mentioned above are the most valuable to open
Zombies with graveyard recursion like Relentless Dead and Poxwalkers give you more value with constant death triggers for more villainous choice triggers
At the very least you can manipulate the top of your deck with cards like Sensei's Divining Top and Scroll Rack, so at least one of your hits is what you want each turn
Classic white, right