Either free with OSM maps or upgrade to TomTom maps. Free OSM maps are updated fairly frequently. Now Premium upgrades offer things like 3 suggested routes.
Ranked in these QuestionsQuestion Ranking
Pro Very in-depth adjustments in settings
You can define vehicle type, which roads you prefer to use (highway, secondary roads, local road) all with a percentage slider.
Pro Free monthly updates
Every month there are free map updates.
Pro Free with OSM maps
MapFactor also provides regular map updates.
Pro Up to 3 suggested routes
This is a premium upgrade but worth the small cost. Without it Navigator always has a preference for main roads.
Con Nag screen to upgrade to Premium TomTom maps
Even if you click 'Don't show this anymore' you still get constantly nagged to upgrade.