If your looking for a job you can be blatantly fried on the job then I'd say none...
If your looking for one you can smoke on your off time then pretty much any!
this. at least lower level jobs and entry level jobs... there are some occupations that imo you can't be stoned at, or at least not safely/functionaly- but chances are if your main goal is to be high rather than to make money this won't even be an issue.
not trying to judge tho, I spent a lot of time stoned at jobs.
as far as jobs that won't worry about drug testing, other than drug dealer, cannabis dispensary/bud tender, trimmer/farm hand... it pretty much depends on your boss/supervisor. I have quite a few friends, myself included, who have smoked weed with their bosses and going into work high isn't a problem really so long as things are getting done. I had one job where the lady in the office knew I smoked and made a joke about signing the paper saying that I would take a drug test.
imo, you are better off/more likely to get a job using the skill set and network base that you have to work from and either quit smoking for a while or find ways to pass the drug test. most places that i know use piss tests which are pretty easy to pass for most places.
if you are only looking for a career where you can be high then fuck your imagination is your limit- you could be a janitor, a painter, a pizza delivery guy, tree trimmer, yard maintenance ... you get the picture. If you are looking for a decent career that you can do stoned, while it depends on your skill set. Most decent places to work are not going to be drug friendly what so ever, at least not on any professional work place. Even if there are others who smoke there, in my experience, drug habits are not something you want to share too much with co-workers.