You've spotted some of the generic "Low Risk" Occupations, but it is down to the Insurer and the rates they and the underwriters favor, so for example Hastings Direct may favor a Teacher than Direct Line.
Another Example is to Try different "Styles" of the Occupation you are, so IF i was a Technical Telephony Analyst some insurance companies don't recognise that, so you can look at the title you are and what you do....so even though you are a Telephony Analyst its also Computer Based, e.g Technical Analyst, Computer Analyst, Telephone Analyst, Analyst, Data Analyst.
All of those potentially you could "Tailor" the Occupation you are to fit the insurer.
Hope this makes sense?
I can't identify other low risk occupations as i said above, depends on the insurer.
Ed you mentioned occupations that are a higher risk to insurance companies but what are low risk occupations? I know teachers and doctors are favourable but what else? I know what I do and was gobsmacked my current insurer favours it (probably because of the tests and courses we have to do and pay for)