I have actually been looking at doing a trek in Nepal but hard to find others to go and to have 3 to 4 weeks off from work.

Annapurna used to be on the list but over the years they have developed the road and that effected the hiking trails. I read they are working on re routing the trails though.
Now, its this 3 Passes Trek I want to do, https://besthike.com/asia/nepal/ever...camp-3-passes/ .
Or this one Manaslu Trek Nepal | Manaslu trek information site - Manaslu Trek Nepal