Pat roast dry with paper towels. This will help it brown more easily. Grind pepper liberally on both sides.
Heat skillet and place 2 T of olive oil in the pan. Sear roast, on MEDIUM heat for 3 minutes per side.
Place roast in crock pot. Put the broth in the pan to deglaze it and pour over the roast.
Sprinkle roast with the Ranch seasoning and place the butter on top.
Stem peperoncinis and slice them in half lengthwise. Place a few on top and the rest on the broth along the sides. Cook on HIGH for 5-6 hours until beef can be easily shredded.
Remove beef to a platter. Shred with a couple of forks and remove fat. Remove the peppers and set along the side of the beef; strain the broth.