I was looking at Wilkinson's filmography on IMDB trying to recall what movies and shows I've seen him in.
I remember him as Lyndon Baines Johnson in the movie Selma which I watched not too long ago.
I also noticed that Wilkinson played Ben Franklin in the 2008 7-episode miniseries "John Adams" which I've never seen.
I think the miniseries must be worth a watch. It won 13 Emmy Awards and IMDB rated it 8.5. It's airing on Max which I have on my DirecTV Stream
account so I've added it to my Future Viewing list.