-Full-frame:
Best: 5D3, then 6D (I would say 6D rather than 5D2 because it has lossless compression and faster sensor)
-APS-C:
DSLR: 650D/700D
Mirrorless: EOS M
EOS M/650D/700D have the latest developments, share a lot of/same RAW modes, and they are mostly equal.
Currently these models have the best capabilities for shooting RAW video with ML.
5D3 has native 1920x1080 resolution in none-crop mode, it's the only camera which
doesn't skip pixels in 1080p mode (have both vertical and horizontal pixel Binning), 5D3 can shoot in higher resolutions with longer recording times compared to other models, thanks to UDMA 7 CF card slot and SD card slot.
Other models have slightly lower native resolution in none-crop mode (1080p mode) which are 1736x976 on EOSM/650D/700D and 1824x1026 on 6D. also other models suffer from aliasing and moire in 1080p mode because of
line skipping, and have lower high resolutions and recording times compared to 5D3.
There are
1x3 (Anamorphic) modes available in 5D3, 6D, also in EOSM/650D/700D and other cameras, in 1x3 modes the sensor reads all vertical pixels, there is no line skipping happening which reduces aliasing and moire a lot, you probably want to read more about 1x3 modes in the forum.