Actually I think Jim Carrey would make a perfect cletus!
Jensen Ackles as Eddie
kasady and carnage are ONE for venom you'd have to find someone HUGE or fuckin pull a deadpool and CGI that shit, carnage would be a little easier in that he's scrawny but you'd have to find someone who could match him in levels of BONKERS
For the symbiote's themselves it likely like the cartoons they use a filter over the actor's lines to make it sound different
What I meant by the Symbiotes having voices is that they actually speak to their host kinda like in the Pat Mulligan Toxin Miniseries.
Robert Knepper and Sam Worthington would be good picks for Kasady and Brock.
Unfortunately The Age Gap between the three is too great, Tom Holland is in his late teens, Sam Worthington is in his late 30s and Robert Knepper is in his 50s. I want the age groups to be closer.
Oh yeah... Well, unfortunately, that's the closest I got. Sorry, dude.
Robert Knepper was one of my choices as Carnage before I felt he's too old for the part.
Soooo... Find somebody who's almost as young as Charlie Cox or Jon Bernthal.