As Tourist points out, any non-accelerative (constant-speed vector ) trajectory will give you constant pilot-relative 1g. You can then choose to apply this 1g in any pilot-relative direction you want by rotating the plane into any acceptable attitude.
Presumably vectored thrust fly by wire aircraft can maintain very strange constant-speed-vector attitudes, in the same way as powered aircraft can maintain constant-speed-vector attitudes quite different from gliders.
Edmund