Here's what I would recommend. Do the first book in each topic then circle back around. I stuck to mostly Salafi-Hanbali texts for consistency not because I think they're the best.
In Usul al-Din you should read at least:
1. Commentary on the 40 Hadith of Imam al-Nawawi
2. Aqidat ibn Abi Zayd al-Qayrawani
In Aqidah you should read at least:
1. Commentary on the Three Fundamental Principles by Salih al-Uthaymin
2. Safinat al-Najat by al-Kittani
In Fiqh you should study at least two foundational madhhab texts. For Hanbali:
1. Akhsar al-Mukhtasarat (there are youtube lectures)
2. Commentary of Umdah al-Fiqh by Hatem al-Haj
In Tazkiyyah you should read at least:
1. Purification of the Soul by ibn al-Qayyim, ibn Rajab, and other authors
2. Heaven's Door by ibn al-Qayyim, ibn Rajab, and other authors
In Tajwid you should study with a teacher at least:
1. The Nuraniyyah rules of Arabic letters
2. Tuhfat al-Atfal basic tajwid
In Quranic sciences:
1. How to Read and Approach the Quran by Zarabozo
2. Tafsir al-Sa'di (short topical overview of the Quran)
In Sunnah you should read at least:
1. The Sealed Nectar by Mubarakpuri
2. Shamail al-Tirmidhi