Dev budget under $25k: Statamic [1] or Wordpress (with ACF [2] & Acorn [3])

Professional work above that: Sanity [4] or Hygraph [5]

[1] https://statamic.com

[2] https://www.advancedcustomfields.com

[3] https://roots.io/acorn/

[4] https://www.sanity.io

[5] https://hygraph.com