Power tubes + either transformer (not always possible to find a part number for the OT on a given model's schem, to compare to another known - I suppose it might be worth adding that info to the all models table, but not sure it would tell us anything new, so much as confirm what is listed and make it easier for the models we don't have info about). Going off the lists above only, the model name (the number part) double checking against power tube type because there are some exceptions/deviations (look at either the timeline or all models legend for the basic categories) should be reliable.
Note that Stencils included quite a few power configs that did not exist in the proper Garnet line (i.e. all the weirdo tubes you never heard of and no power transformer - those are all rather low wattage and single ended though), but they also had (usually but not always) stripped down versions of almost every Garnet power class with the exception of the 400 and 600 (as far as I know - not perfectly sure).
Note that Stencils included quite a few power configs that did not exist in the proper Garnet line (i.e. all the weirdo tubes you never heard of and no power transformer - those are all rather low wattage and single ended though), but they also had (usually but not always) stripped down versions of almost every Garnet power class with the exception of the 400 and 600 (as far as I know - not perfectly sure).