Who is lee on yellowstone?

Lee Dutton was the oldest son of John and Evelyn Dutton, and John's Ranch Hand. Lee was born before his father inherited the Yellowstone Dutton Ranch, therefore essentially built the ranch with his father.

After a herd of cattle was taken from their ranch and kept on Broken Rock Reservation, Lee and several ranch employees, together with members of the Montana Livestock Association, set out to take back the cattle. Unbeknownst to Lee, his brother Kayce Dutton, was attempting to prevent him removing the cattle from the reservation. Lee was shot and mortally wounded by Robert Long, who was about to finish him off at point-blank range when Kayce intercepted and killed Robert. Lee died shortly after and was buried at the family grave site.

As the oldest son, Lee was meant to take over the Yellowstone Dutton Ranch when his father eventually died. Unfortunately, Lee's untimely death put his siblings at odds with each other..