Not sure I have watched 10, even when including Simpsons, Futurama, South Park (which I normally wouldn't, because they hit different spots for me than other stuff more commonly classed as sitcom).
Stuff I liked in no ranking order:
Arrested Development (until season 3)
The IT Crowd
New Girl
Modern Family
Life in Pieces
Unbreakable Kimmy Schmidt (starts kind of lame, but became better for me after several episodes. Might be on the decline again already, but we haven't finished watching)
German ones:
Stromberg (The Office, german edition)
Pastewka