I'd put him at 5 or 6, but the difference between #4 and #5/6 is as big as the difference between #5/6 and #30. I think McDavid is the only active player who can reasonably distinguish himself from the #5-#15 group of players, with the Crosby/Ovechkin/Jagr/ect group.
Also, am I missing something with Beliveau that makes people argue him for the #5 slot? He had a boatload of cups, but his individual awards are less than Crosby's (2 Harts, 1 Art Ross, 1 Smythe and 2 Richards if the award existed). He regularly played on a team with like 5-10 HOFers. Stan Mikita has as strong of a resume over Beliveau's career, so I'm confused for why he never gets mentioned for that spot.
Beliveau "only" won 2 Harts and an Art Ross, but was a consistent contender for 15 years.
* Beliveau has 8x top 5 point finishes, 12x top 10 in points, 6x top 3 in Hart voting, 9x top 5 in Hart voting. It's an incredible run of longevity to basically be elite from 1954 to 1969 (16 seasons). Hell, he was still a point-per-game two years later in 1970-71, leading the Cup champion Habs in points as a 39 year old. Couple that with a monster peak season in 1955-56.
* He won 10 Cups with the Habs, and can be argued as a top 3 player for probably 5 or 6 of them, and a top 6 player for another 3 (he was hurt in one of the Cups). He would have certainly won another Smythe in 56 if the award existed.
Mikita was an incredibly elite player. He was voted in top 30 on the HoH list and is a consensus top 10 centre of all-time. Where he falters is really in three categories.
* Short prime. 1961-62 is his first elite season, finishing tied for 3rd in scoring. After 1969-70 (9 seasons), he was basically done as an elite player. Scoring skyrocketed in the early 70s, so his raw totals were still high, but he went from being a top 3 forward for 9 years, to being more in the 10-15 range. Besides a 57 game stretch in 1972-73, Mikita was done as an elite player at age 30.
* The Bobby Hull factor. They played on the same team, though mostly on different lines. For those who watched at the time, Bobby Hull was the consensus better player. Coaches matched their top lines against his line, leaving Mikita to feast on weaker rotations. The year of Bobby Hull's first elite/Hart season, Mikita put up 26 points. Hull stayed elite after Mikita began his decline. In 1971-72, Hull's last season before leaving to the WHA, Hull had 50 goals (2nd in NHL) and 93 points (7th in NHL). Mikita only put up 65 points, good for 27th in the league.
While Mikita won 4 Art Rosses to Hull's 3, the more detailed Hart records are much further apart.
Top 3 in Hart voting:
Mikita: 3
Hull: 8
Top 5 in Hart voting
Mikita: 5
Hull: 9
For example, in 1964-65, Mikita won the Art Ross. Bobby Hull won the Hart, and Mikita didn't finish top 5. It's not Mikita's fault, but when the people of the 1960s mostly viewed Hull as superior to Mikita, it's hard for us to rate Mikita over Hull. Especially with Hull's superior longevity.
* Playoffs. The 60s Hawks were stacked and only won 1 Cup. If you take a deeper dive, a lot of their seasons ended with Mikita having a weak playoffs. He was great 1961 and 1962, but was consistently outplayed by Hull afterwards.
1963
Hull: 8 goals, 10 points
Mikita: 3 goals, 5 point
1964
Hull: 2 goals, 7 points
Mikita: 3 goals, 9 points
1965
Hull: 10 goals, 17 points
Mikita: 3 goals, 10 points
Lost in Cup Final
1966
Hull: 2 goals, 4 points
Mikita: 1 goal, 3 points
1967
Hull: 4 goals, 6 points
Mikita: 2 goals, 4 points
1968
Hull: 4 goals, 10 points
Mikita: 5 goals, 12 points
1969 they missed the playoffs
Overall, from Mikita's first elite season to Hull leaving for WHA
Hull: 107 GP 60 G 66A 126P +33
Mikita: 108 GP 41G 66P 107P +6
All with Hull typically taking tougher matchups.