Certainly biotechnologists would feel that biotechnology is the most useful. It is always easier to admire the practical outcomes of research, ones that can be directly witnessed by others, rather than the painstaking research over many years that has enabled the technology to be developed.
Therefore, the biologists and engineers and biomechanists play as large a part in useful scientific disciplines. I would say it is too difficult to give brownie points to one rather than another. They are interdependent.