Rigo, Streetwise Mentor itself gives you a card, and its flexible enough that you can either focus on the attack triggers and saboteur effects (Delney, Streetwise Lookout and Enduring Curiosity, for example), or you can try to overwhelm your opponents with sheer numbers in a token build
Thrakkus the Butcher can offer similar output, and Ran and Shaw is excellent as a card that pumps your other dragons and is sometimes multiple dragons in one card
As a mono-colored leader with four life, one might take a quick look and write it off as terrible, but his ability makes it even more resilient than the mighty Whitebeard
His high survivability means he often sticks around to take out multiple threats before finally being defeated, making him an invaluable tool for field control
Urdnan, Dromoka Warrior upgrades all your creatures with counters into double-striking wait, whats that