Yes, Dark Side Consulars are made a "Special Military Advisor" to the Council. On Rishi when you get the holocall from Satele she says "We have missed your input on the Council" which is meant to fit for both the Light Side Council member and the Dark Side "Special Military Advisor" non-Council member.
Actually, you are wrong as I've described above. Here's a video of the Dark Side Consular ending if you would like to see for yourself.