I could care less about PTS
Perhaps you should consider why your choices can't produce, despite supposedly having better tools. Perhaps a sign that they're lacking in some very key tools that you've arbitrarily decided to ignore, or that being exceptional in some tools can help you overcome not being as strong in other tools. Many of your chosen players do not have all of these tools you mention, and the importance you put on these tools is completely arbitrary.
1st SPEED SPEED SPEED - and guys who can fly with breakaway speed who can flat out take you when they want
Marner is comparable or faster in straight line speed than multiple people on your list. The only ones who are notably faster in straight-line speed are McDavid, Mackinnon, Marchand, Point, and Hyman, and having that straight line speed isn't much benefit if you can't do much at that speed, like Hyman. There is also more to skating than breakaway speed, and Marner is one of the most talented skaters in the entire league.
2nd HOCKEY SENSE - knows where to go on ice, knows how to play within team/his line and thinks/anticipates game through faster than others do and always plays behind puck and/or man
Marner is one of the best in the league in terms of hockey sense; really only being surpassed on your list by McDavid and Crosby.
3rd POWER/ TOUGHNESS /SIZE - this is GOD given and innate to all of us and manifests itself in strength on puck and shot and hitting
He says, as he puts the likes of 5'9", 180 lb Marchand and 5'10", 180 lb Point on the list.
4th CREATIVITY/HANDS/SKILL - again GOD given but you need to be able to give and take a pass and finish .. too many guys I have seen with speed and size to burn but ZERO ability to score and get pucks out of their end on wall
Marner is one of the best in the league in terms of creativity and skill, and is excellent defensively. While goal-scoring may not be his specialty...
Goals scored since beginning of last year:
O'Rielly: 27
Huberdeau: 27
Marner: 26
Crosby: 26
Couture: 24
Hyman: 24 (and ironically, many of those because of Marner)
Scheifele: 23
Couturier: 23
Stone: 22
It's certainly not a reason to leave him off, especially when many others on your list are comparable.
5th TEAM FIT / STRATEGIC - most don't buy into it but lines which are successful all have it .. some guys are just lone boners and never seem to FIT and do things which help themselves but not TEAM
First off, this is not a player tool. Second, putting aside the historic disasters that have come from excluding superior players to try and create some kind of strategic fit in a two-week tournament of unfamiliar players, Marner is most definitely a player who is all about the team, can fit on any line and elevate it, and is certainly not a "lone boner".
So as we've established, your chosen players do not have all these 5 tools, and at the same time, Marner is excellent in the majority of these tools and is very clearly a better overall player than most on your list. Marner is unquestionably a lock for the team, as he should be.