He is the best though. OK Let's compare to Graves, the current #1 by opinion.
Passive - Draven gets the bleed and Graves gets the armor and MR. Carries are not tanky anyways, they rely on positioning to deal damage for kills. Edge- Draven. It picks up kills - a lot.
1 - Spinning Axe does bonus damage, triggers the bleed, and is not reduced by Ninjas, and can crit. Their landing location can also be controlled. Graves buckshot is good damage, but it's on a cooldown, and the damage isn't amazing. Edge- Draven
2 - Blood Rush increases IAS and Movement speed. It can also be spammed by using axes. Quickdraw only increases movement speed and even though basic attacks lower the CD, cannot really be spammed ever. Edge- Draven
3 - Spinning Axes Knock the enemy (or multiple enemies - very useful at times) out of position, giving it great utility, and apply an effective slow. Smokescreen does minimal damage and slows the enemy while they stay in the small area. Also they lose vision (very useful..... not really). Edge - Draven
Ult - Dravens ult can More Easily hit multiple enemies and does more damage. It can also go the entire map. Graves ult is very very good. It's the best thing he has going probably. If Dravens hits more than once, however, his does more damage. Often in group fights I find it is easy to hit their entire team twice Edge - Draven