Which "icy blonde" (https://www.google.com/search?q=candice+bergen+cybil+shepard&tbm=isch&ved=2ahUKEwjQ54uQleL8AhU7NEQIHejkAE0Q2-cCegQIABAA&oq=candice+bergen+cybil+shepard&gs_lcp=CgNpbWcQAzoECCMQJzoHCCMQ6gIQJzoECAAQQzoFCAAQgAQ6CAgAEIAEELEDOgcIABCxAxBDOgYIABAIEB46BwgAEIAEEBhQ_gxY4W1g9XJoAXAAeAGAAY0EiAGAHZIBDDcuMTQuMS4wLjEuMZgBAKABAaoBC2d3cy13aXotaW1nsAEKwAEB&sclient=img&ei=x9XQY5DoHLvokPIP6MmD6AQ&bih=757&biw=1600) was more beautiful in their prime and who was the better actress? Their careers seemed to overlap occasionally. Cybill (https://static1.squarespace.com/static/59c5099849fc2b0179b94f8b/t/59c5799c3bb05388d9ed37fa/1322225595077/1000w/0-CBS3-MB-Cyb.jpg) ran during (https://www.youtube.com/watch?v=xcBCN_BZxnk) Murphy Brown's reign at CBS (https://www.youtube.com/watch?v=KgnDd_xsVTc). Cybill (https://www.roadandtravel.com/celebrities/cybillshepherd.html) replaced Candice (https://www.nytimes.com/2020/12/05/style/candice-bergen.html) on Broadway in The Best Man. And both starred in at least one of the top 10 box office movies (https://m.the-numbers.com/market/1971/top-grossing-movies) in 1971, #6 for Candice and #9 for Cybill.

More beautiful: Cybil
Better actress: Candice

I think I'm in agreement with DJM77.

Cybill was at or near the absolute apex of her beauty when she starred in
the 1972 film The Heartbreak Kid. She was extremely well-chosen
for the role, which taxed her acting skills minimally. Here's Cybill in the
film, with Eddie Albert & Charles Grodin. She is stunningly pretty:

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