I'm surprised no one mentioned these

Makes working with bezier curves a lot easier
Bezier Tools
https://blenderartists.org/t/flexi-bezier-tool/1168179

Use bezier tools to layout the curves and curves to mesh to create the surface
Curves to mesh
https://blendermarket.com/products/curves-to-mesh

Select a row of vertex and create a curve to reshape the mesh with fall off.
bezier-mesh-shaper
https://www.blendermarket.com/products/bezier-mesh-shaper

Edit polygons with only the left mouse button
PolyQuilt addon for Blender 2.8
https://blenderartists.org/t/polyquilt-addon-for-blender-2-8/1168918