equivalence of: git log --exclude-author?

Not currently, although there seems to have been some discussion about supporting a -v option in the future, or making the current git log --not work for --author, --committer and --grep.

See also: How to invert git log --grep pattern.

Some other answers reference portions of this, but I had success in my repo using the tactic I saw here

 git log --invert-grep --author=<pattern>

You can add as many author patterns as needed. In my case, the best pattern was the full email, since it is known to be unique

From https://coderwall.com/p/tzdzwa :

git log --perl-regexp --author='^((?!excluded-author-regex).*)$'

This worked for me.

If you don't want to specify --perl-regexp every time you can do:

git config --global grep.patternType perl