Perhaps Speed Skating, but I don't know if someone could ever become good enough to Figure Skate at the senior level after starting this late.
What about Cross Country Skiing or Biathlon? That is primarily a matter of developing massive endurance (and with Biathlon, being able to be very
steady while you are undergoing a test of that massive endurance).
You might get the best answer asking someone who coaches Olympians. Coaches would have actual experience in steering people down the right path to the sport that they are best suited for.
One thing I can say is, it might be difficult for you to start this late, but if after starting this late you do make it to the Olympics, your experience of overcoming the adversity of your late start will serve you well.