Bull spams stomper as our Anti Assassin - Tank! Who is our Anti Assassin - Sniper?
Anti assassin tank honorable mentions - Meg, and Ash
Tanks in general have a favorable matchup against assassins although they are not always counter picks. Stu for example loves dancing around aggro tanks like Jacky or Bull.
Bull has always been this shotgunner that can delete assassins well before his buffies and rework. If an assassin gets on his face they will take up to 4.4k burst damage. With his rework and buffies, Bull can stun lock his targets. Or he can switch to heal and be unkillable.
Meg wasn't mentioned under the post but someone suggested her when I shared the image. I keep forgetting Meg is a tank, and she is pretty good against assassins. Her super is a pretty simple anti aggro tool that can get anyone off her face. She is vulnerable to assassins if her mech form dies.
Ash is a bit tricky, on one hand hes very good against non piercing assassins like Stu and Leon. Ash is also a ranged tank, so he can skill diff Cord in the shadow realm. But assassins like Buzz can counter Ash. Its also easy for Shade or Mortis to build up super but they still lose to Ash in a pure 1v1.
You can suggest a brawler that isn't a sniper as long as you can argue why they are a sniper and in this case why they counter assassins. Now, lets discuss whose the Anti Assassin Sniper!