There is no definitive answer to this question as it depends on your blog’s content, design and overall organization. However, if your blog primarily consists of original content, then you can likely have up to three authors.
If your blog features guest posts from other authors, then you may need to consider increasing your author limit to five or six. In any event, it’s important to have a clear author policy in place and to regularly review and update it as your blog grows.
Ultimately, the number of authors on your WordPress blog is a matter of personal preference and organizational flexibility. However, setting a clear author limit will help ensure that your blog remains cohesive and organized.