i don't have much love for the piledriver personally. i've recently endorsed The Boss on here for a tele pickup since I prefer it alot. but even The Boss is not that telecaster-ish, even if it does sound very cool (its great for 80s hard rock and metal for example). i found the piledriver is a bit too compressed for me - imagine it like a sort of telecaster warpig IMHO. my next BKP will most likely be a BG50.
i read your text, and I think BG50 too, considering all the styles you want. BG50 has the raw grunt, and its still got the fender twang.