Eben Moglen is both technically and legally savvy (he's the one who wrote the GPL). He works on both fronts, and the FreedomBox project which he inspired is but part of his overall work.
Oh, I thought rms only wrote GPLv1 and got a lot of assistance from Moglen for GPLv2, but I suppose you're right, my bad, it was only until GPLv3 that Moglen had a big impact.
