Richard III of course was blatantly political as was much of Shakespeare's output. RIII was a hatchet job and as historically dubious as anything Oliver Stone ever made. It's also his longest play and not quite good enough to justify the length.
I kinda like it. Actually, I thought Titus was his longest play, but no matter. For pure bad guy, RIII is just terrific. You got to love a villain who says,
Conscience is but a word that cowards use, devised at first to keep the strong in awe. Our strong arms be our conscience, swords our law.