Following is a list of troops, crew, and vehicles found on Imperial bases and capital ships. Not everything on this list will be represented.
Officers & Command
Commanding Officer
Command Crew
imperial-naval-officer
Specialists
Crimson Guard
Shadow Guard
Imperial Inquisitor
Imperial Special Agents
Naval Troopers
Imperial Gunner/Engineer
Imperial Navy Trooper
Stormtroopers
Shore Trooper
Riot Trooper
Incinerator Stormtrooper
Magma Trooper
Sandtrooper
Snowtrooper
Stormtrooper
Stormtrooper Specialists
Aqua Trooper
EVO Trooper
Heavy Stormtrooper
Heavy Stormtrooper Grenadier
Imperial Commando
Imperial Navy Commandos
jumptrooper
Scout Trooper
Shadow Trooper
Shock Trooper
Sniper Trooper
Spacetrooper
shock-trooper
Stormtrooper Elite
Stormtrooper Grenadier
Stormtrooper Sniper
Pilots & Operators
AT-AT Pilot
Dewback Trooper
Imperial Combat Driver
Stormtrooper Tank Commander
TIE Fighter Pilot
Droids
Class 1
Medical droid
IT-O 13
IT-O Interrogator
Class 2
9D9-s54 Dianoga spy droid
ID9 seeker droid
R2-series astromech droid
R3-series astromech droid
R5-series astromech droid
Imperial communications droid
Class 3
3PO protocol droid
RA-7 protocol droid
Class 4
KX-series security droid
Viper probe droid
EG-5 Jedi Hunter
Class 5
MSE-6 repair droid
Power droid
Space Transports
Imperial Assault Shuttle
Vehicle Drop Ship
Imperial Troop Deployment Ship
Stormtrooper Transport
M22-T Transport
Imperial Heavy Cargo Shuttle
Lambda-class Shuttle
Sentinel-class Landing Craft
Delta-class Stormtrooper Transport
AT-AT Barge
Starfighter
Tech 4 PDV (droid courier)
TIE Advanced x1
TIE Bomber
TIE Fighter
TIE Interceptor
TIE Striker
Royal Guard TIE Interceptor
TIE Hunter
Inquisitor Advanced VI Prototype
Ground Vehicles
Imperial Speeder Bike 74-Z
614-ava-speeder-bike-AvA
Imperial Troop Transport
Lambda-Class Shuttle
Storm Skimmer Patrol Sled
2-M Saber-class Repulsor Tank
GPT-117 (general purpose troop transport)
Scout-class 2-M Repulsor Tank
TX-130T Fighter Tank
Waveskimmer
Heavy Repulsor Transport
Shark Underwater Fighter
[[[TX-225 GAVw Occupier Combat Assault Tank
ITT (Imperial Troop Transport)
RTT (Reconnaissance Troop Transporter)
WLO-5 Speeder Tank
Walkers
AT-DP
AT-ST
AT-AT
AT-ST Mark III
AT-ET
AT-ACT