Hi welcome to the forum :D
As I was reading I was thinking "mmm, Sultans would be nice in ash with ebony..."
And then I got to "punk, grunge and a bit of heavy rock" :lol:
They still might work well - as would Apaches I guess - take a nice well-balanced stratty tone, not too high output, and then let the playing/rig do the work...
On the "Sinner in the bridge" front, I'm a great believer in matched sets - I reckon you'd be fine with a set.
I've not tried Sinners, my hottest ones are Irish Tours. My ITs do "punk" as I understand it, but they might be a bit bright without the amount of low end it sounds like you want. There is an option of having baseplates on strat pickups - kind of adds more punch to the pickup but keeps the basic strat vibe. I've not tried this, but I imagine it pushes the bridge pickup into "I can imitate a tele bridge pickup a bit, if you want..." territory.