First suggestion is to give up on pussy willow for bonsai. They grow so fast it is hard to manage as bonsai. Also cannot cope with even slightly dry so I keep losing branches and get die back in hot weather.
If you can cope with those problems here are some suggestions:
Chop harder. Second section of any trunk looks better when shorter than the previous section so those long branches need to be chopped shorter than the first part of the trunk. This should also give temporary relief from the execution order issued by the rose gardener.
Remove some branches. Lots of branches growing at on place will thicken the trunk. You already have some reverse taper and it will get rapidly worse if all those branches stay. With this one in particular I can't see any way to reduce the cluster of branches without leaving large scars that won't look good.
Given that willow grow branches really quick I would probably remove all branches to leave just a trunk line then develop branches more suitable thickness for the trunk from whatever buds appear after pruning.
Good luck with the project.