Oldsmobile
#1 Rick Mast
#8 Jeff Burton
#14 AJ Foyt
#20 Mike Wallace
#22 Ed Berrier
#29 Phill Parsons
#31 Steve Grissom
#33 Harry Gant
#59 Robert Presley
#68 Bobby Hamilton
#72 Tracy Leslie
#75 Butch Miller
#94 Terry Labonte
#96 Tom Peck
For Buicks I also have the #5 Innkeeper car
For Oldsmobiles, there are several old 1989-1991 castings I don't see in your list. Several of these also have multiple variations, some as promos:
#1 Terry Labonte from before Rick Mast started driving this car.
#5 Jay Fogleman, supposedly an old casting variation of the promo car Buick, but I've only heard of it, not seen one.
#16 Larry Pearson variation of the Buick, one I've not seen only heard of.
#20 Rob Moroso.
#26 Kenny Bernstein, like the Buick, he's not the driver and was just on the card.
#26 Brett Bodine, exists as an old casting variation of the Buick.
#27 Rusty Wallace variation, another I've only heard of.
#31 Steve Grissom, I'm not sure which you have, but one of them is this old casting promo sponsored by Big Mama Meat Snacks. Back in the day it was one of the rarest and hardest to find promos. It's still pretty hard to find, but I may be able to help out of you're missing this one.
#42 Kyle Petty white/blue Peak car, like the Buick this is very rare and I've not seen one.
There are also several that exist as both the old casting Oldsmobile and the new casting Oldsmobile. These were all in your list, but I'm not sure if you only have 1 or the other, or both:
#1 Rick Mast
#33 Harry Gant, also the new casting version had multiple cards of you're interested in that.
#68 Bobby Hamilton
#72 Tracy Leslie, I'll go ahead and guess that you have the new casting for this one, because the old casting is really hard to find. I may know where one is though, so DM me if you're interested.
#94 Terry Labonte, also the new casting had variations with a blue bumper and a yellow bumper.
#96 Tom Peck
Then for the new casting Oldsmobiles:
#31 Steve Grissom Rodenberry's, not sure which you have.
#31 Steve Grissom Channellock, not sure which you have.
#44 Sterling Marlin Piedmont