Waylon Jones, aka. Killer Croc. Just me reading out some of his dialogue taken from his various comic appearances.
I absolutely hate it when his voice actors go for a so-called "reptilian" tone of voice (Aron Kincaid in The Animated Series and Steven Blum in Arkham Asylum), never been a fan of that. In my honest opinion, I enjoyed him having a much more natural and deep tone of voice (Brooks Gardner in The New Batman Adventures and Ron Perlman in The Batman).
What I myself imagine Killer Croc to sound like, would be along the lines of a feral African American filled with hatred and rage. My own personal attempt here is basically putting my throat to a bloody test, by doing my best "big scary black man with a stone stuck in his throat". After that, I lowered the pitch a bit and added more bass to it.