Obviously I'd have to avoid putting Ashe against anyone with heavy engage early game, but just as a for fun, non-serious idea, do you think Bruiser/Tank Ashe could work?
Bruiser/Tanks are essentially tanks that deal damage. The general trend is that there kits are jam-packed with damage, damage, and more damage - all of which is a complete pain to counterbuild, especially when true/%HP/armor/mr shred is thrown in there.
Mundo's 200 AD steroid, Nasus's infinite scaling nuke, Darius's true damage nuke, tons of damage is mostly what makes bruisers operate as the tanky DPS class despite building mostly tank.
So - bruiser Ashe, no. Ashe has awful damage. All she comes with is CC.
If you just want to focus on the CC though - Ashe is near Tank/Support levels of CC. Most supports are better served counter-initiating fights and peeling for allies than they are initiating fights and locking down priority targets, but Ashe is fairly flexible in going in either direction with her CC.
So - sort of an issue of definitions, but if you're planning on tanky Ashe you should focus more in the tank/support vein than tank/damage, because when you skimp out on some crit/as/ad/armor pen in itemization - you're not going to deal meaningful damage on Ashe.
That said, most Bruisers are melee - which means a simple slow can drop their damage to 0, where Ashe's range can let her avoid that.