I'm not the biggest McDavid fan but the Oilers of this era have done an abysmal job of surrounding McDavid. Hell we could say even this year they went to the cup with a large amount of luck. While even without Wayne, the 80s Oilers were an All Star Team. They won one without him.
Both Wayne and Mario were part of great organizations in their prime. I guess a closer comparison could be Sid but again he had better players, a better goalie in Fleury and a true offensive D quarterback in Letang.
I really don't know where this narrative that McDavid is on an island, or has it worse than Crosby comes from.
Draisaitl is an all-time playoff producer. Bouchard broke Coffey's record for most assists in a playoff run. Hyman has the most goals in a playoff run since Sakic. Nuge is a versatile two-way center/wing who scored 100 points a year ago and has 32 points in his last 33 playoff games. That's without even mentioning Ekholm, Henrique, Foegele, Kane, etc. This isn't a great supporting cast?
Do people conveniently forget that the Pens won a Cup against the powerhouse defending champs when their scoring wingers were Kunitz, Guerin, Fedotenko, and Talbot?