I think that's a really good go. Beyond the HDR part though, I think the picture composition may be improved by a couple of tweaks. I know the construction is wonky but the picture is too, as can be seen by the floor level at the end. So, perhaps try a slight rotation anti clockwise and straighten out that floor line, then crop out what's left of the doorway on the right. The image then looks super. IMO! If it were me, I may also increase the contrast of the window light patterns leading into the distance, to enhance them a little bit more. That would be me though.