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five 2-flute 1/8" straight endmills (such as the #102 endmills from Carbide 3D [8]
two 2-flute 1/8" ball end endmills (such as the #101 .125" Ball Cutters from Carbide 3D)
two smaller straight endmills (say 2 mm or so) (such as the #112 0.625" endmills from Carbide 3D)
Additions:
a stub 1 mm or 0.8 mm straight endmill
possibly a small stub ball end too
V-carving bits (say 30 and 60 degrees)