I thought 16.3.2 was the optimal driver for the Equihash R9 Fury? Not sure though if this will also work for ETH.
16.3.2 for Fury X, and will work with ETH, but due this driver version does not have DAG Fix, hashrate will be lower and droping.
I checked and I'm using 16.3.2 on both R9 Nano, R9 Fury X and even Radeon Pro Duo.
I get 420-430 H/s on the Nano and 470+ on the Fury X with stock clock speed.
Perhaps this would be an acceptable solution for you?
I have not tested 16.9.2.