Determining the co-presenters of a conference presentation when the work is already published I am the lead author of an article publication, and there are 3 co-authors for this publication.

I will submit a proposal to a major conference to present the findings of this published work, and I will be the only one who will do the presentation. 

So, I wonder if I should indicate only my name for the submission, or should I also include the co-author's name also as the co-presenter although they will literally no present anything.

I know it is not nice to exclude them since they contributed to the study, and I will probably include their names. However, I want to know what is common practice for this.
Common practice is to include all the authors of the publication/research that the presentation is based on, regardless of which authors attend the conference.  When in doubt, always include all authors.

If you're the only one attending the conference, list yourself as lead/contact author.  That's the only difference.