There are many tools that render some sort of schematic from RTL: simvision (schematic tracer), Joules, Genus...
Which one would be best for generating documentation style schematics from RTL, or at least a starting point that could then be edited in Visio or inkscape.
-> uses nice symbols for combinatorial logic (adders, multipliers), or better yet a simple cloud.
-> scriptable: rtl in -> desired hierarchy level -> svg / png out
-> essentially something like this, but not limited by Yosys verilog support (https://github.com/nturley/netlistsvg)