Here is a list of the Twitter accounts most followed by the members of the foss4gna community (computed by identyfying the 211 accounts tweeting using #foss4gna with at least 5 tweets, between 2019-08-22 and 2019-09-07).
You can drag an zoom this followers chart
By number of followers in foss4gna
If you want me to compute this for your conference, send me a DM @duto_guerra
Here is the data in case you want to analyze it yourselfThe foss4gna followers network