Plus of course a few takes on all metal monoplanes with multiple engines and multiple rows of passenger seats in the 1920s, if those are the criteria for modern

Plus of course a few takes on all metal monoplanes with multiple engines and multiple rows of passenger seats in the 1920s, if those are the criteria for modernity... Think there's a decent case for the Vickers Viscount in the early 1950s too, as the first airliner with a modern turboprop engine type, with speed and range and passenger experience (big pressurised cabin) comparable to small airliners still being built, unlike the 247 or DC-3.