Pictionary (the Brian Robbins version) had Felicity, the scorekeeper.
Somebody who's older and with a better memory can correct me, but Paola Diva didn't appear on every episode of Concentration. Honestly, until EOTVGS came out, I'd forgotten that she existed at all. It's possible she wasn't on the show early on; at least there's no photographic evidence.
I'm pretty sure the budget of Narz Concentration didn't allow for a prize model. Honestly, they didn't even really need the car in the studio, although it was a nice touch.
Other notes:
- I just found a picture of Alex Trebek and Linda Kaye Henning on the set of High Rollers. I'd thought the idea that she was a guest roller during the original version might have been a figment of somebody's imagination; guess not.
- Bob Eubanks' autobiography (at least the advance reading copy) said Jane Nelson was originally supposed to co-host The Diamond Head Game, not just be the prize model. Eubanks put the kibosh on that.
- My theory: the Eubanks/Rafferty version of Card Sharks gave much more visibility to Susannah Williams and Lacey Pemberton than the Perry version in response to Vanna White becoming a household name.