You can take 5-5 on E, D-sharp instead of 5-4, so that you still have 3 available to take B-sharp
The left hand is totally fine but how the heck am I supposed to cross 3 over 4 while doing chords voicing in the RH?
Can you explain in a bit more detail what seems to be blocking you from doing this? As long as you keep your hand supple as you hold the notes of the chords and play the melody it should feel comfortable and natural.
It strains my 4th finger to bend it inwards is all and I can't maintain a relaxed hand at all. Do you think that taking it very slow and practicing repetition with smooth movements of the hand can work?For now I've found that jgranata13's suggestion to take 3 on the B# works best for me.