My preferences would probably be:

  1. D4s because it’s awesome with great UI, fancy AUX lights, modding potential.
  2. MR70 because of side light, usable UI, USB-charging with power bank function
  3. Olight 50r seeker pro because of magnetic charging.

Would not buy the Klarus. It’s extremely floody, 15 Lumens for low is very bright. For me it’s a very weird combination of wanting to be “tactical” with a tail button, but not being very focused, tail starting in low and the “instant” turbo you have to wait for.
Can’t say much about the other lights.