Just hit master in HL playing exclusively Gazlowe. I would pick other heroes only if I was last pick and we needed support (I would still go Gazlowe even if we miss tank) or if Gaz was picked/banned (got some bans by my own team after they saw the prepick and when closer to master I was getting some respect bans from the other team).
New Gazlowe is freaking awesome! Started the climb from Plat 4 after placements. Now, to brag: