Who are the scholars and what are the books that discussed commitment and how to reach Allah, other than Hazem Shoman and Sheikh Muhammad Hussein Yaqoub?

All praise is due to Allah, and prayers and peace be upon the Messenger of Allah, and upon his family and companions. To proceed:

There are many preachers who speak on matters of spiritual refinement (Raqā'iq), admonitions (mawā'iẓ), and explaining the path of سلوك (spiritual journey) to Allah. You can benefit from the audio section of our website. As for books, we recommend "Mukhtaṣar Minhāj al-Qāṣidīn," "Mawʿiẓat al-Mu’minīn min Iḥyāʾ ʿUlūm al-Dīn," "Tahdhīb Madārij al-Sālikīn," and "Al-Dāʾ wa al-Dawāʾ" by Ibn al-Qayyim. Among contemporary scholars, we recommend the admonitions and lectures of Sheikh Muhammad al-Mukhtar al-Shinqītī and Sheikh Muhammad Saleh al-Munajjid. You can also benefit from the books of Al-Hafiz Ibn Rajab and Sheikh Abdul Aziz Al-Salman.