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
BarakAllahu Feekum
Wa Salaamu'Alaikam
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