Yes, the Holy Diver/Irish Tour HSS set would be a good bet.
Holy Diver is great in alder body/maple neck guitars - just makes them sound HUGE. It's so versatile: enough grunt for the heaviest grind, massive thick mids for big rock chords, a fantastic warm clean sound. It's got it all.
It might have been me that made the balance comment about HD/ITs :oops: Yes, they balance in that you can switch from mid/neck to bridge on the clean channel without a massively overpowering jump in volume. There is a difference, but it's one that you can even out by varying your pick stroke.
If I get another HSS guitar, I'd probably put Slowhands with an HD - from what I've read they have a bit more mids & output which would in theory make them ideal for an HD HSS set.
I also have a Trilogy neck (It's an H-S guitar so no mid) with an HD - the Trilogy certainly has more than enough power to keep up with the HD. I'm not sure that "gritty blues" is what the Trilogy is about though :)
Can't comment on the baseplate question as I've not tried them...