Pebble, but neither of their upcoming revived models have the same spread of sensors shoved into them as Garmin does if that sort of thing matters to you.

I would happily buy something just like my Fenix without the stupid pulse ox/heart rate monitor, but I understand I am in the minority there. I'd keep the GPS, compass, temperature, altimeter, and barometer functions. But then, I'm probably the sole person on Earth who would be the first to buy a phone without a goddamned selfie camera on it, either.