This is not a direct answer to your question but rather some things to draw your attention to:
Artists using the same medium as you for inspiration
Looking for inspiration by searching for artists that use the same medium as you do is the closest thing that comes to one’s mind (and it looks good on paper if you are an art teacher) but it is a rather superficial way of approaching the problem. Although you may both be using the same medium, you will most likely be approaching it in a very different way, and using it for very different purposes (have different subjects of interest to draw).
You should rather look for :
- thigs that explore your interests (in whatever respect), be it in art or other areas of life
- things that have similar aesthetics to the one you appreciate, in any art medium (photography, cinema, oil painting) or in other areas of life
Whom do you consider professional artists? Those who are famous? Those who sell well? These things may have more to do with how well they promote their work, rather than the actual work. For this reason you should better look at separate artworks, rather than artists. (The internet is very convenient for that purpose, but you may want to consider deleting your cookies beforehand – you are looking for new inspiration, not the same things you are familiar with)
Accepted art medium
Generally speaking, any medium becomes respectable when there is an artist acclaimed by some critics (whose opinion you should better ignore; consider your own instead) that uses it.
Do you consider ballpoint pens a respectable drawing medium? Take a look at some artwork made with ballpoint pens.