I used a u47 style mic on a cello recently and got very nice results.
we were trying to eliminate the room noise as much as possible with gobo's and close mic'ing. the producer wanted it that way so they could do the reverb in mixing as the room wasn't ideal for cello. ORTF sounded too huge for the band's mix, and MS sounded way too roomy. in the end, we just stuck a 47 style mic on her and it was our favorite result of the day
can't remember how many feet back to be honest, but we liked it a lot closer than I would have thought before.
in the same session, we liked the Blue Woodpecker on violin.