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Thinking about putting some Dwarf Crayfishes (Cambarellus shufeldtii) in with the zebra plecs. These dwarfs max out at about 1-1.5 inches. Has anybody tried this? Think this is ok?

crays of any size will go after anything they can grab after. When I was a kid, I thought minnows 10 cm long would fare well against similarly sized crays (1 -1.5 inches), only to wake up to an eaten minnow.
I wouldn't risk it. Unless you're into really really really expensive feeder fish.

Thanks everyone. What about dwarf cories and/or the yellow variant of the cherry shrimp? Does that combo sound ok?

Corys and shrimp will be fine, IMO. Corys will not be active at night so won't compete for food, and the shrimp will hardly be competition.
That being said, I support shrimp fully, as I am personally convinced that newly born shrimplets are a very very good food source for all fish, and plecos are no exception. The shrimplets of caridina/neocaridina are the same size/smaller than BBS, so they're definitely game for our little plecs.

The temperature for cherries vs. the zebras have a small window together. Zebras like their warm very warm (80-86F) whereas cherries prefer temp range of (70-80F).

I have cherries in my community tank and the temp ranges from 80-84F. The lights and additional powerheads I have really heat up the tank. The cherries are doing fine but from my original purchase, only a few have survived.

If you're looking for a shrimp/zebra combo - you may want to look at Amano shrimp (Caridina multidentata). Their best temp range is 70-78F but they can tolerate higher temps than most shrimps. I've had them in my zebra tank and they were not a threat to the zebras.

Just watch your tank mates if you plan on trying to stimulate your zebras to mate. Mating temps are 84-86F according to the breeding article.

-Angela