You probably already know the current Rack version of Plaits has super-saw mode, and of course there’s Squinky’s Saws. But the newer Plaits firmware also has a String Machine mode - unfortunately we don’t have an official Rack version of that yet. And docB’s Pad2 has already been mentioned.
The first example in that video sounds very synthwave. Have you tried following some of the building synthwave tutorials on YouTube? Might be some clues there.
Alternatively, if you were able to find a similar sound in a VST like Surge that might help give clues how to patch it in Rack.
As an aside, I usually spend more time looking for 70s style sounds. But I was recently trying for an Enya-like background track for a video and came up with the following using Plaits chord mode through chorus reverb and phaser. Just demonstrating how much the effects can impact the sound.
I just used to do Saws with lots of reverb. Now I am cheating, I use Squinky’s sfz player.
What do you think about the analog brass though? I don’t like how they usually do it, so I used to do sync+fm or something. It’s something I found on youtube few years ago. Sounds pretty convincing
As others have said, use lots of chorus. And of course my Saws is the most accurate super saw and has been in the library much longer than most of the others.