Nexerlin is a must imo. It's literally game changing. A lot of faction mods are nice too, and are usually compatible with Nexerlin, like Diable Avionics, Blackrock, SCY, and ORA. Diable is my favorite, as it's basically a bunch of kabalists turned weapons corporation. Their ships actually transform, too. Though, personally I'd steer clear of any of Vayraa's mods. A lot of people advocate for Vayraa's mods, and they have a large backing in the community, but it's precisely that backing that concerns me.

They recently separated their main mod, Kadur Remannt, into several different ones for an uncertain reason, and have manually hard-coded their mods to not work alongside certain other ones, so it's hard to trust what will work with Vayraa's mods enabled in the future, let alone the extent to what Vayraa could sneak in. I don't want my save data or OS files deleted because I installed the "wrong mod" at some point in time, so any sign of bad faith restrictions or disruptions is a hard turn off for me. I also don't really appreciate "anarcho-communist propaganda" unironically being a selling point for any mod, or anything for that matter.

If none of that bothers you, it may be worth looking into. Just know what your incentivising.