You can see the top engaged people (people who posted, commented or reacted) on your interface (Members metrics).
To get the full list of people, you can export the list of members in Members metrics > Members list. Then, you can remove people with a score of 0 to get the number of people who generate any engagement.
At the moment, we do not have access to the connection data, so we cannot determine if these people connect to the community.
The Wall of Fame includes top people from all categories: Top Engaged, Top Influencers, Top Commenters etc. If a user is selected in different categories, his picture can appear several times in the Wall of Fame. When you generate the link of the complete Wall of Fame, it then reflects top users for each category (each member can appear only once per category).
If you want to see people profile picture only once and for one category, you can try the mosaic from the Members Statistics.
Members Engagement score is dealing with how people are engaging with the content of the community, in a group or a segment.
A Member Engagement score = 2*number of posts + number of comments + number of reactions made by the member with the period.
We give more weight to posts because the action of posting is more engaging than just reacting to post.
The top engagers are people who are likely to post more than others. They also engage with the existing content by commenting or reacting.