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:
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CAR - Sebastian Aho, age 23, in 2020-2021 season (3rd place team in regular season)
NYR - Mika Zibanejad, age 23, in 2015-2016 season (9th place team in regular season)
NYI - Matt Barzal, age 23, in 2020-2021 season (12th place team in regular season)
VGK - William Karlsson, age 23, in 2016-2017 season (4th place team in regular season)
DAL - Joe Pavelski, age 23, in 2008-2009 season (1st place team in regular season)
MTL - Nick Suzuki, age 23, in 2022-2023 season (28th place team in regular season)
please feel free to correct me with counterexamples, but to me it looks like Suzuki is right on track for a "mid tier" 1C.