I’m not sure what qualifies as a "full range" speaker. Perhaps one that goes down to 20 - 25 Hz ± 3dB? I’ve never owned large speakers with drivers more than 10" in my life. I’ve owned some Sonus Faber floorstanders but I’m more of a standmount guy. All my current speakers are standmounts, going down to 38 and 40 Hz and I love them for what they do. I don’t like to use subs with speakers although I own a rather high quality sub.
To me, a speaker that is able to go down to 40 Hz ± 3dB on paper is the minimum requirement in providing adequate bass satisfaction. Anything 50 Hz or higher don’t cut it for me. Having said that, I’ve read about people describing the wonderful bass produced by their small bookshelves and how it is perfectly adequate for them. These bookshelf speakers have 5" drivers, reaching down to 60 or 65 Hz or so in the bass. People have different expectations so I would not be surprised to hear about folks preferring smaller speakers in their medium to large rooms.
By the way, the Buchardt S400 MKII recommended by Tvad looks good. It has a passive radiator located at the rear of the speaker which boosts bass response. The Marten Parker Duo also works on this same principle.