Turgeon:
-5th place in Hart voting
-21st place in Selke voting
-2x 6th Team All Star
-2x 8th Team All Star
-Highest he ever placed in NHL scoring was 6th, 7th, 13th x2, 14th, 17th, 18th. So no top-5 finishes in scoring, two top-10 in scoring, 7 top-20 in scoring.
-Not much playoff success
-No international hockey participations
Tkachuk:
-10th in Hart voting, 14th in Hart voting
-17th in Selke voting, 41st in Selke voting
-2x Second Team All Star
-2x Third Team All Star
-2x Fourth Team All Star
-2x Fifth Team All Star
-2x Sixth Team All Star
*Note: He was voted third team at LW & sixth team at RW in the 1995-1996 season
-Highest he ever placed in NHL scoring was 12th, 13th, 14th, 15th, 19th. So no top-5 in scoring, no top-10 in scoring, 5 top-20 in scoring.
-Like Turgeon, not much playoff success.
-Not really quantifiable in numbers, but Tkachuk was one of the premier power forwards of the 90s/early 2000s.
-A lot of international hockey representations with USA, including multiple Olympic Games, and was on the winning America team during the 1996 World Cup
In 9 of his 18 seasons, Tkachuk was considered, at worst, the 6th best player in the NHL in his position. In comparison, Turgeon in 20 years was only considered at least the 8th best player in his position four times.
Turgeon had a slightly longer career and had better numbers. Both had fringe Selke votes in the odd years, doesn't mean much for either.
So, for me, while Turgeon played a tougher and more valuable position, and if you were to compare both of their best seasons (Turgeon in 92-93, Tkachuk in 95-6), Turgeon had the better peak. However, if I look at the totality of their careers, Tkachuk did more for a longer period of time than Turgeon did. Turgeon also carried the reputation of being very soft, whether that was warranted or not.
To me, neither of them should be in the Hall. But I think Tkachuk's argument to get in is much stronger than Turgeon's.