The best advice that is usually given on this forum is to go out and try a few, find something you are comfortable with and enjoy it and not bother what everybody else has. There are demo days happening soon or go to LBS and see what they have. There are very few really poor bikes out there so sometimes it is best to find a shop you are comfortable with and stick to one of their brands to start with. That’s how I started out
I have been lucky enough to have owned a number of bikes, and only one of them was a (mild) disapointment.
Edit:
On re reading your post, I will offer my advice, but don’t necessarily follow it!
A trek Fuel Ex might cover your requirements- light enough and an efficient climber but with some downhill potential (26″)
A friend has a Specialized Epic Comp 29er which he thinks is fantastic but perhaps doesn’t have enough travel?
If you are looking for a hardtail, Cotic Solaris with a 120mm fork (29″)?