Any output style can be modified to your needs rather than trying to find exactly what you need in the existing 6000+ styles for the desktop version. The online version has more restricted options.
I am sure it is there somewhere, a desktop version that has what you need, but how to find it!
I see that Vancouver “out of the box”, is a numbered style, so I took the Vancouver numbered style and changed the citation template to (Author, year| p. or pp. cited pages|), and if 3 or more show first author et al… That may need to be changed further if you need to show more or less authors and how it may handle ambiguous authorship (I selected adding a or b to the year).
How does that work for you?
Vancouver (Author, Year).zip (4.39 KB)