DS9 easily had the most badass cast of any Star Trek series.
Kira-a former 'resistance fighter.'
O'Brien-a former war hero.
The science officer, Dax, loved to practice Klingon fighting styles.
The head of security was a superpowered alien.
Worf was well past his 'Worf Effect' years on TNG and was now 100% badass.
Even the doctor was a genetically engineered superman with enhanced strength and reflexes.
And of course, they were led by The Sisko.
Also Morn was cool.