I would say WBBB 1.7 but I've heard your stories on SEBP lol.
Seriously though, and this is only going from those podcasts, the WBBB 1.7 should work for you. My guess is that you either weren't laying in it correctly or hadn't pitched it correctly, both of which take some practice when you first start out. Over on hammockforums, there's regular discussions about guys 6'6/6'7 having no problems in the WBBB.
Another issue in getting a flat lay in the WBBB may not be your height at all, but your weight. Again, from hearing your podcasts, you are near the upper limits of the "flat lay" in the WBBB 1.7. Getting a custom (as I did) would help in that as well.
PM me offline and I can maybe help further.