Yeah, Soundghost are amazing I love their stuff. Their packs are great too, and they put so much into all their releases.
As a wildcard, you could also consider Arcade by Output. This is technically both a sample library and a pre-made Instrument Rack (but in VST form.) So it’s like you’ve subscribed to Splice - aka: it’s the samples that you’re subscribing to - but instead of negotiating a traditional sample pack interface, you just get a playable sample pack. The trade off is, you gain ease of use (no clunky downloader & file management) along with a playable interface, but you don’t ever get to keep the samples directly on the hard drive as you would with a traditional Kontakt instrument or sample pack.
I almost didn’t get Kontakt because I like how simple it is, and there are days if I’m wrangling a Kontakt library, that I wish I had stayed with it. But back to SfM, if you have the samples, check if the instruments are pre-loaded. If not, using something like Preset Maker you can have yourself a whole universe of sampled synths as instruments all racked for Ableton. I slept on this a bit, so I’d recommend exploring that depending on the version of SfM you have.
It used to be the norm that sample packs would come with a C0-7 of every note. But these days, you’re much more likely to see G# Random Sample.wav which means you really need a key mappable software/hardware that automatically creates samples if you want to use Splice style packs.
Kontakt is a blessing and a curse in some ways. Once you’re in and you have access to that world, it’s kinda hard to go back to something that doesn’t have as much in the box. NI get a lot of heat and I agree with some of that, but I also get a shed tonne of mileage out of the sounds. You can essentially get most of the things you’d want for electronic music just with Komplete Standard, or even just Kontakt 7 itself. But I can see why you might want to stay away. On Black Friday, Arcade was £50 for a year, and given that Komplete Standard is £250 and lasts 2 years, there is even an argument that Arcade is a better value, if you can stomach the subscription model and the lack of sample downloads.