Since it seems that Gab is currently the most digitally stable free speech platform, could I get some suggestions of who else is on that site that is a good follow?

I established an account with GAB three or four days ago but have not been able to open the site since the 12th.

All I'm getting is a black screen with 'Gab' in the middle of it.

The influx of new users is still causing slow downs to near stops with Gab.  The spin up of additional servers might be slower than other systems because Gab builds their own servers which takes more time than buying off the shelf items.  I have been on Gab since November of 2016 and the roadblocks that the Big Tech world has put in front of Gab's technical staff have slowed their advancements, however, Gab has always overcome these roadblocks.  Be patient, the performance last night was a step forward and people are still migrating to their new home at Gab.