So, the meta right now in the big tournaments seem to be dominated by 2 ships and 4 ship Biggs lists. Coming up with something that's good against both these, and the random lists, is definitely a bit of a challenge.
The TIE Defender though is possibly one answer. It's pricey, but with the double tap ability, and with Relentlessness, it would do cruel things to Biggs and company. A Flechette cannon or ion cannon isn't a bad way to slow down Nym and Miranda.
The TIE Defender can take a couple of hits and keep going.
If one wanted, you could pile in a few named pilots that are still talked about on the Imperial side... Omega Leader and Quickdraw fit into a list with top TIE Defender pilots.
Thoughts? Or have I completely missed something obvious?