In terms of tenure, Richard Matvichuk is near the top of the list.  The Defenceman is one of the few players who had over 700 Games for the Dallas Stars (733).  Maavichuk was not known for his offensive style but his stay-at-home defensive style was sound and was helpful in the Stars first Stanley Cup in 1999.  He was with the organization for twelve years, which certainly made him worth a first round selection.