Depends how much money you are willing to spend and how much my ou are ready to dive into synthesis.
To get two sounds you need either two synths or a bitimbral/multitimbral synth that can play at least 3 voices simultaneously.
Micromonsta 2 should be much fun (it can do 2x 6 voices), but there are not that many controls on the panel.
As a guitarist, what should please you is the big sound LMNC gets in the video: but he’s using a Moog Grandmother that is roaring easily. Micromonsta would need quite some tweaks to sound as aggressive, or some distorsion but not the guitar kind: you’d kill the bass.
Any synth will do anyway, but you should imo dive in synths and synthesis first, get a simple one such as a Korg Minilogue XT and tweak it until you know what you’re doing.
Volcas are cool, it was my own entrance door, and they are cheap, but very limited in sound design, you won’t get that roaring sound.
Might be a good first step though. Beware, I don’t think they are sold with a PSU so you have to add it to the price.