Define
good example?
Some developed examples:
https://www.black.ceo/
https://dad.ceo/
https://www.mr.ceo/
https://mikejohns.ceo/
Some redirect examples:
Ebay.Ceo redirects to: ebayinc.com/company/our-leaders/
Lemmy.Ceo redirects to: Lemmy.co
Sherpa.Ceo redirects to the linkedin page of JoinSherpa.com's CEO
Badass.Ceo redirects to Cesson.com
I wouldn't image .CEO is a good option from an investment POV considering the high renewal fee and narrow markets where this TLD could work.
Something such as Marketing.CEO where the .com counterpart has a long history of registration might make sense, just them $75+ annual renewal fee's turn a $10 registration into a $750+ investment over 10 years.