Vega's.
:-D
Ironically these puppies make 2000 h/s mining Cryptonight.
I don't think you can get more hash per dollar currently.
Which VEGA Mike?
Vega 64?
Edit: ...and here it is: https://bitcointalksearch.org/topic/cast-xmr-high-speed-xmrcryptonight-miner-for-rx-vega-gpus-2-khashs-2256917
Vega64 can do 2000 H/s using cast-xmr using first soft power table reg for Vega 64 (1100MHz HBM @ 905mV) from https://www.reddit.com/r/MoneroMining/comments/74hjqn/monero_and_vega_the_definitive_guide/ at ~210W
But can do also 1800 H/s using a low power reg https://www.youtube.com/watch?v=8Uq3Om2MXOE at ~135W.