Which early aircraft could have carried out a Taranto-style attack?
Short answerThe Sopwith Cuckoo could theoretically attempt it, but the Swordfish was the earlier aircraft able to do it at useful scale and with comparable success.
NotesThe Sopwith Cuckoo provides the theoretical early option for this kind of harbour attack. Its short range and single-seat arrangement suited the First World War concept of launching close to an enemy anchorage. The Swordfish was the earlier aircraft able to execute the later mission in useful numbers and with comparable success. The distinction is between proving that an attack was possible and fielding an aircraft that could carry it out at operational scale.