I think Weber has 1 more year left at the elite top 5 status, although that contract is extremely laughable. Funny how those crazy long-term contracts all look bad except Sid's and maybe a few others. I might have a man crush on Weber more than others, but I still think he has that level of play.
Keith, Doughty, Karlsson, OEL, Weber are my actual 1-5. When you get to 6 it's tricky. I think you could then make the case for the following - Hedman, Letang, Josi, Gio, Subban, Piets. Then I have guys who are right there in Burns, Carlson, Suter, Seabrook, McDonagh. Am I forgetting anyone? I'm doing this w/o looking at rosters. I feel like I'm missing someone.
Now realistically I would rather do a tier system.
Tier 1: Keith, Doughty, Karlsson.
OEL/Hedman/Subban/Letang all get to this level, but to actually stay on Tier 1 is doing it night in/night out. It's such an elite status. IMO the 3 I mentioned are building to be HOF players.
Tier 2: OEL, Weber (who stays consistent here), Letang, Subban, Hedman, Gio, Josi, Piets.
I think OEL and Weber stay at that elite Tier 2 status the most while IMO Hedman/Letang/Subban show they have more potential but fail to secure that consistency. Letang puts on another season like he just did and stays healthy... and he's there.
Tier 3. Burns, Carlson, Suter, Seabrook, McDonagh.
I'm sure I'm missing some, but this would be the tier 3 of solid elite defenders. Maybe add Vlasic and a few others to this one. These guys are solid top players but don't have that next level elite status or have inconsistencies that keep them down. Burns has the highest potential out of these guys. Seabrook is probably the most deserving for his insane consistency.