I kind of like this definition of the Dissident Right. Because we have become political dissidents in our own country for valuing western traditions and the constitution. One blogger plotted the various groups in the Dissident Right here. It's the upper right quadrant of the typical political grid.

To maintain our traditions, and not lose everything to the left there are going to have to be a few things we all agree on. But how do we do that with such a disparate group? Some folks are going to see White Nationalists in that quadrant and reject the whole thing, others will reject it because Catholics are in the group.
The blogger listed these 4 things
1) A belief in the Truth.
2) An intention to calibrate act and understanding towards the Truth.
3) A belief in empirical data.
4) The belief in a Christian Transcendentalism, or at it's very minimum, a non-hostility towards it.
https://socialpathology.blogspot.com/20 ... right.html
I'm not a big fan of the list, but I think a list of a few foundation beliefs is a great place to start. My list would include things like Equal Justice under the law, belief in empirical data, individual liberty.