Best Video Codec for new video engine

What are the best codecs for the new video engine, with smooth scrubbing and decent performance? On OSX here…

ProRes or DNxHR /HD

I experimented a little and found that I was actually able to get away with H264 as long as it had a keyframe every frame. Obvs prores/dnxhd are better for memory use, but it’s simply too big when there are new cuts coming in every day. If I have issues then I’ll try prores/dnxhd…