It would not be complete without these:
Brian's "Grandpa":
An well-used example from the Weber Grill Restaurant: (Of course, the museum will need a cafe, may as well have a grill going.)
A flat-top 26: (Jeff's blue would be a shoe-in, but I'll donate mine if he can't remember the combination to his kettle safe!)
Of course, we can't be too hung up on charcoal. Junior here would fit nicely in the gas gallery.
Need some kettle art for the walls too:
Big question is, how many guards do we need?