First of all, LBJ was ruthless and he had spent a lifetime in politics being RUTHLESS! He was know for it when he was in the Senate and still was as VEEP and president.
Wanna talk about corrupt, evil, ruthless, and CRUDE? That was LBJ in spades! His language was dirtier than what runs in sewers and cesspools! He gave interviews to reports whilst deficating on the john, with his pants around his ankles!
Obama? Hell...he had Pelosi and others do the arm twisting, as any other Dem president would have. Obama was and still is an arrogant, egomanical, self aggrandizing blowhard with effluvia for brains.
I agree with everything you stated. Johnson also got all his legislative agenda enacted.