Roglic won Dauphine 2022 by 1:41 ahead of first non Jumbo rider, Ben O' Connor in third. That's dominating.
In P-N 2022 Simon Yates was a tough nut to crack. Still, he was half a minute behind. Martinez in third was more than 2 minutes behind, Adam Yates in 4th was 3:30 begind, Almeida in 8th was almost 6 minutes behind...almost unheard of in a race such as P-N. That's dominating.
Vuelta 2021, he wins by almost 5minutes ahead of Mas. Bernal, a Tour and Giro winner at the time, was in 6th place more than 13 minutes behind. That's dominating.
Itzulia in the same year. Best non Jumbo rider is Pogačar in third, over a minute behind. Rogla with a dominant performance in the last stage.
Paris Nice 2021. He was in the lead by a minute before the last stage, with three stage wins in the process. Only a disaster in the last stage prevented him from a dominant overall victory.
I'll leave the 2020 season out of it. Just wanted to say that in my opinion, it would have been the most dominant season from Rogla in his career if not for the Dauphine crash. He was flying before that crash.
2019 Vuelta maybe wasn't that dominant, but still...he was 3 minutes ahead of 2nd place before the crash on stage 19 and won by 2:30 over Valverde. Also his first GT win.
Romandie 2019: dominates with 3 stage wins and a dominant performance in the ITT ahead of heavyweights like Ganna, Kung, Campenaerts, Tony Martin.
Romandie 2018, him and Bernal were toying with everybody else on the climbs. It was almost Pogačar vs Vingegaard or Contador vs Schleck like.
Itzulia 2018. Maybe the most underrated stage race from Rogla. He was dominating the race. Before the last stage he was 2 minutes ahead of Landa in 2nd. Gap almost unheard of in the Basque stage race. You usually had riders devided by seconds at the top. Everybody is salivating about Vingegaards win in this year's edition which he won by over a minute, same as Rogla in 2018. Yet Rogla's victory margin became reduced in the last stage only because a pretty serious crash. He than survived the last climb, even though without teammates and still managed to keep the gap at 1:09 to Landa, who wasn't a meme rider back then, but a serious racer, seen as a mythical climber by many at the time.
Here you have it. Dominating stage races since 2018.