It's interesting that Lars Wastfelt has so many well composed and varied film images from what looks like the same outings. Either he burns a lot of rolls and only selects the good ones, or his keeper rate is super high. That he primarily uses a Zeiss Ikon and Zeiss lenses tickles my sensibilities. I know there's nothing stopping me from going minimalist like that, but I lack the guts to lose images due to improper focus or inability to change ISO on the fly.
One of my favourite flickr photographers is Chunyang Lin. He's a Taiwanese cinematographer who shoots on a variety of cameras. In the mid 2000's he used a lot of film, mostly the Summicron 50 either on a Bessa or M6 TTL. He moved to digital mostly and now uses a combination of his iPhone, Fuji X-Pro 2 or Sony RX100 IV, but he still shoots with a M9 and a Contax T3 on occasion.
Here are his Leica tagged images, mostly film and some M9:
I'm also quite fond of bricolage 108. He used to shoot buttloads of expired film with the Olympus XA.
As for groups, I was made a mod at Natura Cameras, which used to be for the Fuji Natura Classica, but is now open to all Fuji Natura cameras like the Natura S, Natura Black, and the Klasse. After another fellow and I were made mods, we did a huge cleanup of the pool where loads of Italian photographers thought 'Natura Cameras' meant nature, and were dumping loads of pictures of birds and deer taken with DSLR's.
I'm also very fond of the Contax T3 group:
The Leica M6 TTL Millennium group has pretty high quality images:
and the Leica M7 group tends to be pretty high quality, too.
and the Minolta TC-1 shows what the camera can do in various conditions: