Seats address one part of the anatomy.
The Arse.
Now, I'm no ergonomic expert, nor am I qualified in whatever fekkin qualification deals with spinal orientation, trapped nerves and arse numbness, but it seems to me that everyone so far has just focussed on the bum comfort thing....not surprising really, Bum positioning is very important to many of those in the 12 section
Try another approach....and, a far simpler and FAR less expensive option than going for a certain seat by a certain manufacturer that happens to fit the certain shaped fat arse of whichever reviewer recommended it
Your spine controls affects nearly all of your body....certainly your coccyx which is at the base of it, and also things that you haven't complained of like tingly fingers etc etc.
Changing the position of the spine, its orientation and bend, can have an enormous effect on arse comfort.....so I'd genuinely suggest that you borrow/buy a set of bar risers that will let you fiddle both UPWARDS, BACKWARDS AND DOWNWARDS with your hand positioning......hands effect arms effect shoulders effect spine.
People here are so willing to immediately shout out about their own particular seat solution, but a lot of it tends to be "oooh look, I spent a thousand pounds on a top of the range seat, I love it" rather than a properly considered approach to WHY you are feeling the pain......these wankers who recommend these posh seats omit to say that they may well have tried 5 types before, all at four hundred plus notes a pop, and all that they've ended up with is a seat position that hides the ergonomic causes for ther discomfort, rather than curing the reason for it in the first place
Start with the basics.....position, reach, angles, posture, compression
PS I'm feeling aggressive tonight........but I stand by what I just said