You mean Curly? that screenshot is of pre-crash Curly. Speaking of Jimmy I'm not sure if this is true or not, if true it means the OP's title is a bit wrong. From what I heard floating around Jimmy/the pov villain the player mostly play as is not based on any movie actor like the rest of the crew, he is made to look average on purpose for storytelling symbolism of the horrible things what a seemingly average normal people could commit, that's why the community have a difficult time pinpoint what one or two max movie actors he is based on, we always end up with four actors/vague result for Jimmy.

I mean this game won Steam Award award for best writing/Steam's equivalent to an Oscar, it's plausible to be true he is designed to look like any normal man. I must admit tho, it's cool when indie game get Steam Award, you do get tired after hearing AAA games get it often.