I have no triple crank suggestions, but I would replace crank first and assume bottom bracket is okay.

My FSA Vero crank last year developed a similar wobble as I wore out the original BB (Shimano UN27 (or is it 26?) x 122.5). I replaced the BB with a much shorter brand new IRD BB, and once installed, had the exact same wobble. Mine was visible in the chainring as it rotated. I assumed that I had either buggered the taper in use or had bent the spider. No crash to speak of, just wobble from use.