I'm currently using a Librem 5 with PureOS 11 and Phosh. PureOS is a bit behind on software releases compared to other available distros, but I find it to be the most polished and stable experience.

In the past I have used a Neo Freerunner and then a Nokia N900. The former demanded plenty of your attention but could be made to work well enough, while the latter was a really nice yet exceptionally hackable consumer device. Before I switched to a Librem 5 I had carried a second phone with Android for about 3 years as the N900 was already too old for comfortable web browsing and there was nothing else on the market that I'd consider worth switching to for a while - but that was the only such exception.