Honestly, these two memes are the best summary of DS9 anyone would ever need.

"To Sirloin With Love" is one of the best series finales ever made and doesn't rely on narrative tricks. It just resolves the series by addressing the clash of generations central to the show in a way that is meaningful and doesn't make anyone look bad. #KingOfTheHill

As such, these are the top 10 episodes:
A Beer Can Named Desire
Pigmalion
The Bluegrass is Always Greener
Returning Japanese I & II
My Own Private Rodeo
Hank's Back Story
A Rover Runs Through It
It Ain't Over Till The Fat Neighbor Sings
A Portrait of the Artist as a Young Clown
To Sirloin With Love

Peggy's Fan Fair and A Rover Runs Through It show how, while she is the worst, she's not the worst main character.