So, who had the first high-bypass turbofan?
The Zeppelin Reborn: LZ-130
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A shaft-driven turobfan helped rush that airflow out with such velocity as to produce some forward thrust, said to be enough to overcome the drag penalty. (Some might suggest this was the first hi-bypass turbofan.) The multi-stage cooling of the water-bearing exhaust stream had the extra beneficial effect of quieting the powerplants, and of course goes without being published, greatly reduced the free electrons found the exhaust stream. Sadly, in spite of designed-in screens, it would have eventually been clogged with soot, remembering the ZRS condensers’ rather tedious cleaning process.... However temporarily the blend of Ruhrchemie’s synthetic gas oil with 13.5% hydrogen would, if the air temperature and humidity were cooperative, produce 1 kg of water for every kg of fuel consumed.
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The whole gondola was a wind tunnel to cool the exhaust to reclaim the weight so they didn't have to vent lift gas.
I always thought the Graf Zeppelin was more graceful than the chunkier Hindenburg.