I prefer OSMand over Organic Maps, because it has much more features, just the map renderer isn’t as pretty.

But I mostly use it for pedestrian and bike navigation. But I think car navigation works very well as well.

Also, if the map data isn’t so great in your region, you can try playing StreetComplete and help improve it yourself.

OSM is the Wikipedia of map data, and offers likely the most detailed map that we have.