If they had a 1D star they'd have a couple of Cups already. Ekholm is a good no.2 D IMO, I would say he's comparable to an Oscar Klefbom.
The Penguins had a mediocre D group the year they won without Letang, I think they can build a d-corps equal or better than that.
Honestly if they can build a back on par with the 16-17 Oilers (which had a top 10 goals against in the league that year)
Klefbom Larsson
Sekera Russell
Nurse Benning
Talbot
They probably can win a Cup given how much more dominant McDavid/Draisaitl are today and better overall forward depth than that 16-17 team had where Patrick Maroon (lol) was the best winger. Cody Ceci needs to go.
They will need a goalie but I think Campbell becomes much easier to move when he has a bounce back stretch, he showed some signs of that in the playoffs as is (saved the team's ass in the LA series).
The Penguins D that year was still better than what the Oilers had this year. Schultz that year was better than any D on the Oilers this year (he got Norris votes that year, and he was integral to the Cup run). After him the Pens D wasn’t spectacular, but they had seasoned, solid veterans all the way down the depth chart.
In addition, the Pens team defense and bottom-six was much, much better than this year’s Oilers’.
I don’t think there’s really a comparison to be made. That team had just as much firepower as this year’s Oilers, but much superior top to bottom depth. And that’s not even mentioning the goaltending that Pens team got in the playoffs:
Matt Murray: 11 games played, .937 save%
M-A Fleury: 15 games played, .924 save%
It’s easy to gloss over that team after so many years, but that was a ridiculously tough, well rounded team. The current Oilers don’t compare at all.