What size and style of pre-1922 aircraft carrier would be most useful in the Second World War?
Short answerHermes and Eagle are the strongest candidates: Hermes for range and Eagle for her large hangar.
NotesThe comparison is constrained because only Langley, Hosho, Eagle, and Hermes resemble later aircraft carriers closely enough to qualify. Eagle's hangar capacity and Hermes's cruising range stand out, and both qualities remained useful in the Second World War despite the ships' early designs. The requested trade-offs in armour, speed, displacement, and hangar height remain unresolved.