Complex sentence: In most film and TV adaptations of Nero Wolfe mysteries, before and since, Horstmann has been a very minor character, but Coote's Horstmann got considerable screen time in the series.
Split into simpler sentences: In most film and TV adaptations of Nero Wolfe mysteries, before and since, Horstmann has been a very minor character. But Coote's Horstmann got considerable screen time in the series.