Geologist just sounds too similar to Ruin Maniacs. Granted they're supposed to be Indiana Jones type archeologists, but still. They could also be filled with alternate scientists that use rock and ground pokemon like the Cold Storage Workers were. Protesters could be an interesting concept especially in the wake of Plasma being Poke-PETA. Prima Donna also sounds like another interesting concept considering they could be the older versions of Idols from D/P/Pt.

Anyway, here are some quick ideas of my own:

White Dwarf Starlet / Old Idol
Physical description: Oldest version of Idols and Prima Donnas. A washed up old woman who tries to hang on to what little fame she has. Has a look inspired by Norma Desmond and Baby Jane.
Specialty: Ghost and Fairy. Namely Banette, Mismagius, Cofagrigus ('20s and '30s love for Egyptian stuff reference), Chandelure, Gourgeist, Froslass, and pretty much any fully evolved fairy. May use cat pokemon during rematches or Battle Tower type challenges.
Location: Mansions, country clubs, chateaus, theaters, movie studios, haunted areas, ETC.

Bug Girl
Physical description: Tomboy-ish little girls. Think how Yellow looks in the Pokemon Adventures Manga.
Specialty: Bugs
Location: Forests and anywhere there's bugs.

Bug Queen
Physical description: Older versions of Bug Girls (Kind of like Bug Maniacs). Wears a dress similar to Vespiqueen and a tiara with antennae on it. They lampshade how embarrassing the costume is constantly.
Specialty: Fully evolved Bugs
Location: Forests and anywhere there's bugs.

Big Softie
Physical description: Burly men that talk tough and have flower beards and train fairies. Also may team up with Hex Maniacs and/or Fairy Tale Girls and become "Mysterious Family"
Specialty: Fairy
Location: Hanging out around Hex Maniacs and Fairy Tale Girls