I don't think that's even accurate. He had about a 3-year stretch (2012 to 2015) where you could make that argument, but for the bulk of his Islanders' career he was exactly what he ended up being in Toronto - a good, but not great, player. Outside of that 3-year stretch, he was never above a point per game and never was a threat to win an Art Ross, Richard, or Hart.
This is sort of what I mean about Tavares' career being seen as greater than it actually was. People often talk about him as though that 3-year stretch was what he was every year of his prime, when the fact is that was the only 3-year stretch of his career where he played like a top 10 player.
Those stats were from his first season to his 9th season. He was a upper tier star back then comparable with a lot of similar tier producers.
Him being 9th in pts and 9th in ppg during that period. The players ahead of him would be
The players ahead of him were.
1. Crosby (1st in pts and 1st ppg)
2. OV (5th in ppg)
3. Kane (4th in ppg)
4. Giroux (8th in ppg) - similar had really 3 or 4 elite years like Tavares (12, 14, 18)
5. Backstrom (6th in ppg) - very consistent but really one super high end year in 2010
6. Malkin (2nd in ppg)
7. Kopitar (10th in ppg) - 2-way play gives him the edge over Tavares
8. Stamkos (3rd in ppg)
Players behind him:
10. Kessel (never a better player than Tavares really)
11. H Sedin - only 2010 and 2011 hed be better than tavares
12. Getzlaf - 2011 and 2014 hes better than tavares, besides that pretty similar
13. Benn - 2014, 2015, 2016 are his 3 elite years similar to Tavares
14. Joe Thornton - most of his prime was done by this period but still elite seasons in 2010, 2013 and 2016
15. D Sedin - elite seasons in 2010, and 2011
He was an elite high end point producer who was at least a top 20 player in the NHL over that time. His 3 year peak he was likely closer to top 5 but overall he was pretty great at producing points and being a high end player.
Most guys in that era were not consistently top 5/10 players year in and year out with few exceptions (87, 71 when healthy, 8 besides 2012, Stamkos - 2010 to 2014).
For the leafs he has been a top 30 player only once in 2018-2019 and has many years he's in the 40-50 range which is a major decline.