I will just note that fountain pens tend to require thinking about your stroke direction a bit more than other pens; it’s pretty easy to dig into the paper when going upwards. There can also be issues with getting the flow going; most cursive scripts date from a time when fountain pens were pretty much the only option, and are designed around these issues.

If you don’t want a cursive script then you could also look into the faces found in old Speedball lettering manuals.