With the exception of Medvedev on hard and only on hard, I truly think the next gen have even less of an excuse than the lost gen - they face an older version of the big three and still failed to capitalize, are probably even less consistent slam to slam because of their greater weaknesses and started to lose to their newer gen successors right off the bat when they were the ones with the greater experience.
Call me coloured by nostalgia but there didn't seem to be someone who can play lights-out, aggressive tennis and just downright overpower the top players anymore before Sincaraz arrived. Sure Fedalovic's contemporaries like Nalbandian, Safin, Soderling, Berdych and later Wawrinka have their own weaknesses and might be less consistent than the next gen top players day-to-day, but they all have that extra gear where they are capable of being aggressive, are much more balanced off both wings and can just blow the opponent off the court. This is something Zverev, Tsits and Med can't really attain - they might serve faster or move better but they just don't have that overpowering ground game once the ball gets in play, limited by technical weaknesses off one wing or their own passivity.