Though his receiving numbers aren't anything spectacular and he only caught 40-plus passes twice in his career, Mili could be considered one of the best all-time draft steals in Seahawks history. After an All-American career at BYU, the prolific pass-catcher lasted until the sixth round because he was recovering from ACL surgery and Seattle was rewarded for taking a late-round flyer on Mili as he went on to become the best overall tight end to ever play in Seattle.
Graham obviously had far superior numbers as a receiver, as he's one of the best receiving tight ends in NFL history. However, Mili is the only player on this list who played his entire career in Seattle and he offered far superior run blocking skills, playing a key role in running back Shaun Alexander's rise to stardom. Between 2001 and 2004, Alexander rushed for over 5,600 yards and scored 60 rushing touchdowns running behind one of the best offensive lines in football that was only further aided by the presence of the 260-pound blocking tight end. Additionally, Mili had a few solid seasons as a receiving option as well. His best season came in 2003 when he caught 46 passes for 492 yards and four touchdowns, helping the Seahawks win 10 games and return to the playoffs.
In a shorter period of time, Graham had all the flashy statistics to be first on this list. But Mili was the superior Seahawk who played on some very good teams, making him the easy choice for the top spot in what has been one of the leanest position groups in team history.