It's very hard to say any catcher of the 1970's was better than Bench at any aspect of catching...hitting, hitting for power, calling a game, throwing runners out, blocking the plate...Bench was the best.
In the late 70's the best at blocking the plate were Johnny Bench and Carlton fisk because they could seal the plate and catch the ball without risking their entire body like Ott did. Plus they were each bigger than Ott so a bigger target and I do not remember many successful collisions of a runner into either Bench or Fisk.