My vote for most taken advantage of is the on-call Ops people. Salaries sometimes half that of the SWEs, expected to be woken up at 3am, interrupted all day by "urgent" requests ("I can't connect to the server I need access now" -> "whoops it was my SSH key"), responsible for the product running 24/7, respond immediately to security incidents ("patch this asap"), stay up overnight for maintenance or deploys to legacy systems, act as de-facto architects, expected to be experts on virtually all technology.

Wouldn't be surprised if one dude in Texas working 60+hrs/week is singly responsible for every Tesla in the country continuing to get remote updates.