Tatsuya was not the leader of the Timerangers, but was the team's Field Commander.
Wes was the second-in-command and field commander of the Power Rangers Time Force.
Tatsuya only returned transformed for the 25th, 35th, and 40th anniversary specials. Never teamed up with the Gaorangers nor returned in Gokaiger and Ninninger.
Wes returned unmorphed and morphed for the Wild Force team up, the Red Ranger 10th anniversary team up, as well in Super Megaforce and Super Ninja Steel.