The BuddyPress recent members widget doesn’t bother to check if a user has uploaded an avatar. Some BuddyPress site admins would prefer not to show any users who are still using the generic mystery man avatar. You can get more control over your widget display by using a plugin that checks for avatars specifically. BuddyPress Members With Uploaded Avatars Widget is a free plugin from BuddyPress developer Brajesh Singh of BuddyDev.com. This widget lets you showcase a list of members who have uploaded an avatar recently or changed their photos.
The widget comes with a settings panel that allows you to filter the member list by recently active, randomness, popularity, alphabetically or by date joined. You can also specify the number of users to list and the size of the avatars. Download BuddyPress Members With Uploaded Avatars Widget from the BuddyDev website.