First i would try carving a large wedgy, get the balance right and see how the tree looks from that. also i wouldnt cut the knob on the right flush, carving a feature there might help to offset some of the inverst taper in other areas. i think this would be a good option if you wanted to try to keep as much of what you have.
could play with some left n right angles too. nice nebari, but i think the tree comes out the soil a little straight in your bid to show all the base, could possible sacrifice some base for some more overall dynamism. might help to offset some taper issues too.
other options are to cut off one of the left or right apexes. maybe the right one. then tilting the tree right from the base. then try the other side.
or Leatherbacks shorter tree option. but i would do it all in stages
great material btw! i love the look of that rugged terrain too. i would be like a kid in a sweet shop!