My 1955 Raleigh Lenton may have the nicest ride of any road bike I have ever owned... the 531 frame combined with extremely slack frame angles and 26 by 1/4 Dunlop tyres at 60 psi equals one hella smooth ride which gets even better with leather wrap, Wright's 3N saddle, and MKS Sylvan pedals.
And the Lenton is also fast.
But then...the 1957 Peugeot PLX8 has a ride that is nearly equal to the Lenton, is lighter and more nimble, and is a much better climber despite only having 8 speeds.
And Lamplight's Univega (probably Miyata built) is one of the nicest looking bikes I have ever seen.