This one took awhile since I haven't played much rank, but I finally got there. My 6th golden weapon goes the rodent tank Hammond (well technically he's called Wrecking Ball in the game but I prefer calling him Hammond). Even the control panel is gold. Such a nice detail. Been playing Hammond the past few weeks and have really improved with him. Probably the funnest hero they've added to the game post-release. Hoping I'll have success with him in ranked.