Yes, Rabbi Zevin was a talmid chacham. But he was not on the level of the Chazon Ish, the Chofetz Chaim, Brisker Rav, or Rav Schach.
When we have different rabbis with different opinions, we should follow the ones who are bigger gedolim.
By the way, saying that someone is a talmid chacham doesn’t mean anything. A talmid chacham can be an apikores, too.