Vine had an excellent TT in the Vuelta some weeks ago, nearly beating Ganna, finishing within the same second. That was a short (12.2K), pan-flat TT at 56+ K/hr so always favouring Ganna massively. If that isn't a reference, I don't know what would be one.
With that shape, a climber like Vine would always feature in a more undulating TT like the one in Kigali.
In general, while the field of the TT wasn't very deep, I doubt if there were any real contenders missing given that an in-shape Vine, Pog and Remco would most likely always be the main podium contenders.
I honestly don't see why you would try to project the circumstances in Kigali onto a totally different TT in the TdF:
1. Hautacam, a single hors-categorie slow (avg 28.5K/hr) mountain TT with 645m altitude in 10.9K = 59m / K) vs.
2. Kigali a much faster (avg 49K/hr) TT with shorter hills with 758m altitude in 40.6K = 18.67m / K .
Maybe I'm missing something (as in: you're only referring to the last 2 years in cycling?), but Vingegaard has dropped Pogacar multiple times on climbs in the TdF, admittedly, we'll have to go back to pre-crash Vingegaard e.g. 2023 Col de la Loze, 2022 Col du Granon and Hautacam but even 2021 when Pog was (shortly) dropped on the Ventoux.