Jinbe is a SH too.Counting Chopper -1 ,
Usopp -2
Zoro - 3
Sanji -4
Luffy -5
Robin should get arm. haki to help against her limb vulnerability.
Brook might develop arm haki. but I doubt it.
Nami may get ob haki and we might find her ability to navigate so well may be because of some latent ob haki skill? Though I doubt it.
Franky probably won't get any haki, idk he needs it. He's a robot he can add seastone to his metal parts so he can hit Logia and radars to substitute ob haki to a degree.
Shit that's right, still getting used to that.Jinbe is a SH too.
And yeah, I can see Nami getting observation haki while Robin develops the other one. Franky with seastones would be badass. I doubt brook needs it.