I guess the ideal thing would be to include the information about the author position in the search ranking. Papers where the author is first or last rank higher than papers where the author is in the middle.
For technical reasons, we can't include hints like that in our search. But in the long term we might switch our search to a different technology where we can do all the fancy stuff like that.
I definitely understand the use case, you seem to be from the life sciences where papers have many authors and author positions are very important