I use and recommend:
WME Magic
WME Chat addon
WME Clicksaver
WME Junction Angle Info
WME Place Interface Enhancements
WME Road Selector
WME Route Speeds (MapOMatic fork)
WME Speedhelper
WME Street Name Checker - https://greasyfork.org/en/scripts/371038-wme-street-name-check
WME Street Viewer Availability
Top tip, use !script <name> via a direct message to communitybot on discord and it will give you the link.
Choice of addon may depend on your level and also what tasks you focus on. Also, some functions overlap between different addons. This list seems to coexist nicely, but you can’t use all of them simultaneously e.g. because some of them overlay roads with different colours. That said, my list is:
WME Toolbox
Waze Map Editor - Magic
WME Advanced Closured (only useful for L4+)
WME Color Highlights
WME Junction Angle Info
WME Road Selector
WME Route Speeds (MapOMatic fork)
WME Speedhelper
WME Speedlimits
WME Street Name Check
WME Street View Availability
Waze Edit Count Monitor