Abbott Elementary and other sitcoms with great first seasons

Abbott Elementary wrapped up this week and while I was thrilled that it was such a great finale, I'm going to depressed until it returns for its second season. This show was such a pleasant surprise and only got funnier/sweeter/better with each passing week. It can sometimes take sitcoms a while to find their footing (ahem, Seinfeld, Parks and Recreation), but Abbott Elementary was off to the races from the very start.

This got me thinking about other sitcoms that started out really strong (now whether they stayed that way is a whole other post), including Arrested Development, It's Always Sunny in Philadelphia, Frasier, How I Met Your Mother and Modern Family.

Which TV comedies would you say had stellar first seasons?