Here's a really nice looking 1947 Sunbeam S7, a postwar model that looks as good or better than many of those other big name bikes of the same era.
The engine is a 24 horsepower, 500cc vertical twin sitting longitudinally in the frame which allows shaft drive. The shaft drive turns a worm gear which is not something you see every day, The rear wheel has a simple plunger suspension.
Evidently, the performance isn't overwhelming and some would fault the suspension for less than sporty handling, but I really like the look. It's far less busy and cluttered than a lot of Harleys and Indians of that era and won't get lost in a sea of lookalikes.
Reports from owners say the reliability is high and if you're looking for a bit of attention on bike night from a design that makes plain you don't have to be painted in wild colors with sharp edges to catch someone's eye, this is your machine. I like it. It's for sale on eBay.