A lot of folk drops to the relative major at some point and if you are thinking "3 chord trick" it won't work.

Likewise there are some (they usually seem to be in D for some reason) that have BOTH a Bm and a Bmaj in.

The nearly chromatic run down in the middle of Henry Martin is not an easy find, and I use one "chord" in St James Infirmary that is not in any book I have ever seen but it had the notes I wanted!