Worstgen
Winsmoke Sanji
Every other color spread or two as of late has SaNa fanservice. I think the reason he doesn't do it every time is just to be a subtle (or to troll)
JioFreed
Yeah, they interact in a lot of color spreads which is interesting considering Oda usually don't pull that kind of fanservice, most of the times we have the crew having crew moments but with Sanji and Nami he's like "hey, actually these two are into something" x3