alright, well, in the absence of any concrete examples, I had to guess at which players meet your definition of 'mid tier 1C'. here's what I came up with:
___
CAR - Sebastian Aho, age 23, in 2020-2021 season (3rd place team in regular season)
[TABLE=collapse]
[TR]
[TD]24G[/TD]
[TD]33A[/TD]
[TD]57P[/TD]
[/TR]
[/TABLE]
NYR - Mika Zibanejad, age 23, in 2015-2016 season (9th place team in regular season)
[TABLE=collapse]
[TR]
[TD]21G[/TD]
[TD]30A[/TD]
[TD]51P[/TD]
[/TR]
[/TABLE]
NYI - Matt Barzal, age 23, in 2020-2021 season (12th place team in regular season)
[TABLE=collapse]
[TR]
[TD]17G[/TD]
[TD]28A[/TD]
[TD]45P[/TD]
[/TR]
[/TABLE]
VGK - William Karlsson, age 23, in 2016-2017 season (4th place team in regular season)
[TABLE=collapse]
[TR]
[TD]6G[/TD]
[TD]19A[/TD]
[TD]25P[/TD]
[/TR]
[/TABLE]
DAL - Joe Pavelski, age 23, in 2008-2009 season (1st place team in regular season)
[TABLE=collapse]
[TR]
[TD]25G[/TD]
[TD]34A[/TD]
[TD]59P[/TD]
[/TR]
[/TABLE]
MTL - Nick Suzuki, age 23, in 2022-2023 season (28th place team in regular season)
[TABLE=collapse]
[TR]
[TD]26G[/TD]
[TD]40A[/TD]
[TD]66P[/TD]
[/TR]
[/TABLE]
please feel free to correct me with counterexamples, but to me it looks like Suzuki is right on track for a "mid tier" 1C.