You would have to filter for artists with 1, 2, 3 etc. name parts.
Then you could use "Guess value" with a regular expression as source, e.g.
$regexp(%_filename%',(.*? .*?) (.*),$1==$2)
and target format string: %artist%==%title%
for the artists with an ampersand, the source would look like this:
$regexp(%_filename%',(.*? .*?& .*?) (.*),$1==$2)
But you would have to spend the effort to find out how many name parts an artist has. MP3tag cannot read.
Alternative: if you have the artist name somewhere in the folder structure, you could fill the field ARTIST from there, import the filename as it is and then remove the artist name from the TITLE with an action of the type "Format value" and a $replace() statement.
The whole thing looks a lot like