Imagine still thinking Primebeard and Roger are far above the current strongest top tiers, denying reality and what the manga tells you isn't the way to go bro.
Primebeard and Roger are>= Shanks/Kaido/BM imo.
So no he wouldn't have lost a few men, he would've had a lot of casualties, as they said in the manga.
Imagine acting all and mighty when you're the one who is denying what the manga tells you.
Roger conquered the throne then Whitebeard ruled in front of it up to his death, both are gone and no one has taken the throne yet. From Doflamingo's own words Roger and WB were in a different class.
Whitebeard was stated to be the only one who could fight on par with Roger. Reminder that the fat meme was 44 years old when Roger died so well in her prime.
And even Luffy himself told you the Pirateking is stronger than Kaido and BM. "I will surpass you and become the Pirateking"
Finally Laido has been crying for 2 decades because of Roger's and WB's common subordinate : ODEN.
Roger/WB > Old WB > Yonko/Oden.