Trout was also dull on the radio
Perhaps, but he was one hell of an ad-libber and didn't do half the prepping Cronkite had to do to sound 1/3 as good.
BTW, according to legend it was Trout who named FDR's speeches "Fireside Chats." And ht was also the one who standardized the opening, "Ladies and gentlemen, the President of the United States." For the first of those addresses CBS provided the technical suppport including the announcer. As there were more speeches, other nets traded off, but they all followed Trout's lead.
Now, that's history