The noble shaikhs that I in my very limited knowledge am aware of are 1. Shaykh Abdul-Aziz Bin Abdullah Aal-Shaykh, the Grand Mufti 2. Shaykh Saalih al Fawzaan, 3. Shaykh Ghudayaan, 4. Shaykh Abdullah bin Abdul Azeez Al Aqeel 5. Shaykh Saalih bin Abdul-Azaiz Aali Shaykh and these are the Shaykhs that I am aware of who live in Riyadh.
If someone could add to this small list it would be of benefit, Insha'Allah
Abdullah b.Umar May Allah be pleased with them both said: 'Every bidah(religious innovation) is misguidance, even if people think it is good.' Al-Lalikaii in Sharh Usıl Iıtiqıd Ahl Al-Sunnah wa Al-Jama'ah Vol 1. P134, no.111