Is a musician the first thing that comes to mind with a revived skeleton, though? Or someone who sprouts extra limbs being an archaeologist vs anything else? Those were powers that Oda gave new benefits to having; Brook used his soul powers in his music, but it wasn't built that way. Same with Robin using her powers creatively to study and explore. To me, any particular power is secondary because whatever it is, Oda would make it work to the advantage of the crew and the story, even if it isn't immediately obvious?
However I need to revise & remind about these a lil bit:
- rubber is functioned around physical work, so it's a good supplement for fighter.
- robin isn't just about extra limbs, it's body part. It's an excellent supplement for her spying.
- human human fruit gives intelligence, something that is used well so far, to leard medic.
- soul (as opposed to physical) is the one thing linked to (when we listen to) music.
Long story short, all SH DF supports their role one way or another. Having a T-Rex wouldn't give additional benefits aside pure strength. Whether you like yamato or not, want her to join or not, if we discuss about yamato being an SH, then her df must help her role one way or another.
Let's say, if she's just a combatant, then prob T-Rex would be fine.
If she's gonna be a lookout for example, her df would be hawk or other animal with excellent eyesight.
Then the potential stonemason role, her having byakko would work well since one of it's affinity is metal.