You are generous. I conflated K-K-K-Keith McKenzie with K-K-K-KGB in my mind. They were similar players, as you point out.
But I also melded Keith McKenzie with Keith Traylor. Traylor was a svelte, athletic 250 lb linebacker who had a brief stint with the Pack. He went on The Coach Mac & Cheese diet and ballooned into a 340 pound nose tackle. The big man lasted an amazing 17 NFL seasons.
https://en.wikipedia.org/wiki/Keith_Traylor