If I had to kill one, Usopp suuuuuuuuucks. He doesn't pull his weight, especially given his knowledge of botany, toxins, and gadgets. He still doesn't truly believe in his friends, either. He always lets me down.
I felt like Jinbe had death flags from the beginning and totally expected him to die a long time ago. He's a solid right-hand-man who takes orders seriously, and I thought he'd complete the trope by laying down his life. His fight against Who's Who was decent, but I feel like his relationships with the other crew members are superficial.