Before your post I'd never heard of the best man, but looking at those video's I can understand why he was so succesfull. He seems like a very funny guy. In holland we had Toon Hermans, he was also a comedian which could quite good sing as well and had several hits in the netherlands. People of that caliber aren't born anymore. rip..
He was from a different era. Some of his jokes could be considered rude, but I don't think he was out to offend people. A lot of comics from that time could be pretty sexist and racist, but he seemed to be gentler than them. I'm sure he wasn't perfect, but he brought a lot of happiness (as the song says).
I think Toon Hermans was from that era too, and also indeed sometimes called rude. But to be honest, I like that far more than some comedians from this era, they are often a lot alike. No distinction anymore..