Either Biomin, or my first choice, Apagard (from Japan).

Biomin is cleaner, but weaker.

I generally choose Apagard though. If you do too, the Premio is a good version with a substantial hydroxyapatite content.

Try to buy from a reputable seller if Apagard. I'd not worry about Biomin much.

Edit: also note that these are rinseless pastes, intended to remain on the teeth for as long as they linger. This is where Biomin has an advantage, being cleaner. Spitting is fine, but rinsing will reduce efficacy.

Edit II: Some will wail in disagreement. I think a waterjet can literally add years to the average lifespan while helping with oral health. Maybe consider one, with simple design and minimal features.