I've been using SwiftKey for about as long as you have and for a while, about once or twice a year, I'd do exactly what you're doing- looking around for a better, privacy focused keyboard. I find one or two and try them out for a while but always end up back on SwiftKey because the predictions are unmatched.

OK, this doesn't have swipe to type or a notepad, but I'm trying out Thumb-Key. It's a very different sort of keyboard, almost akin to the old-fashioned way of texting with just the number keys on a phone, just updated for a smartphone screen. The problem is that it takes practice/memorization to learn, because it's a whole new layout. It's open source and very privacy conscious (there's no predictive text or autocorrect).

I use Gboard and have been meaning to find an alternative, so this is a useful thread though it seems the concensus is there aren't really any.

What I'd love to do is completely remove any reference to stickers and gifs from the emojis selection but it's not possible. The emojis button can be removed from the keyboard, maybe it's time to go back to traditional ASCII.

Seconded, I currently use unexpected keyboard but I really want something with swipe typing.

Openboard FTW

Any of these allow you to change the size of individual keys like Smasung Keyboard?