Off the top of my head, my gut reaction is that it would be fairly easy to do with the query module (not sure how well you know SQL).
https://docs.expressionengine.com/latest/add-ons/query.html
This is something we would consider adding if you wanted to open an issue on github https://github.com/ExpressionEngine/ExpressionEngine
Found this query works pretty well
{exp:query sql="SELECT exp_members.screen_name AS revision_author, exp_entry_versioning.version_date FROM exp_entry_versioning JOIN exp_members ON exp_entry_versioning.author_id=exp_members.member_id WHERE entry_id='{entry_id}' ORDER BY version_date DESC LIMIT 1"}
<li>Last Edit: {version_date format="%m/%d/%Y"}</li>
<li>Author: {revision_author}</li>
{/exp:query}
HI Matthew,
I think I saw this one answered in slack.. so I thought I’d drop the answer in here for anyone following along..
{exp:query sql="SELECT exp_members.screen_name AS revision_author, exp_entry_versioning.version_date, exp_members.avatar_filename as avatar FROM exp_entry_versioning JOIN exp_members ON exp_entry_versioning.author_id=exp_members.member_id WHERE entry_id='{entry_id}' ORDER BY version_date DESC LIMIT 1"}
<a href="/avatart-upload-file-path/{avatar}">Avatar</a>
{/exp:query}
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