My natural instinct is to first and foremost say Sela Ward (https://www0.putlocker0.com/show/night-court/season-4/episode-17/):
https://m.media-amazon.com/images/M/MV5BMTg3Mjc4NjkwMV5BMl5BanBnXkFtZTgwMjg2NzEyMjE@._V1_UY268_CR87,0,182,268_AL_.jpg

http://www.sitcomsonline.com/photopost/data/684/sw5.jpg

http://i29.tinypic.com/2l2h36.jpg

https://78.media.tumblr.com/20b16e7f3be7c6f9a415650f95bea73b/tumblr_n5f8tgD9N21ty9yplo7_400.gif

I almost forgot to add (https://www0.putlocker0.com/show/night-court/season-5/episode-7/) Teri Hatcher (http://nightcourt.wikia.com/wiki/Kitty_Daniels):
5iyPtsAGLUg&t

https://vignette.wikia.nocookie.net/nightcourt/images/c/c8/Kitty_Daniels.jpg/revision/latest?cb=20141027112045

https://i.ytimg.com/vi/5iyPtsAGLUg/hqdefault.jpg

http://www.sitcomsonline.com/photopost/data/684/th3.jpg

http://forums.previously.tv/applications/core/interface/imageproxy/imageproxy.php?img=http://assets.chud.com.s3.amazonaws.com/d/d2/d29da7e9_vbattach1396.jpg&key=bc1e8374a51206d1a7c790189603968d11a54bcf5d52b0ced67d9ada6a6e61ef

http://www.sitcomsonline.com/photopost/data/684/th1.jpg

Identical twin actresses Denise and Dian Gallup immediately come to mind...they both made memorable guest appearances as identical twin rock 'n' roll groupies Wally and Willy Azzari, respectfully, in season three's "Up On The Roof."

Judy Landers in "The Former Harry Stone"

Judy Landers in "The Former Harry Stone"

Teresa Ganzel in "Caught Red Handed"

Fran Drescher