I have the Easy Angle (for wings) and the Companion Ruler (for the geese) and they work fine, but Bonnie Hunter has a new ruler the Essential Triangle ruler does both wings and geese.
I've not tried the Deb Tucker ruler.
Below are video's of Bonnie's and Deb's rulers to help you decide.
https://www.youtube.com/watch?v=UDUbcC17cFY
https://www.youtube.com/watch?v=F7WQpzknLGg
And the Eleanor Burns ruler
https://www.youtube.com/watch?v=_WElW8sqkuw