I think I know what you mean but I haven't had any experience handling B&W through filters. I usually use Topaz or Nik B&W conversion software.
I would try doing the B&W conversions through different coloured filters and seeing which you like the most ...purple filter, green filter, red filter, blue filter..... green might be best.
I do not mean to tint the images that colour, still b&w images but different coloured filters will give different tones to the colours present.
I hope you understand what i mean because I haven't explained it all that well.