1. Introduction  
2. Multi-survey datasets  
2.1. The COSMOS-Web survey  
2.2. The JADES project  
2.3. The UNCOVER program  
2.4. Additional archival data  
3. Quasar search via SED fitting  
4. Results and discussion  
4.1. List of quasar candidates and their number density  
4.2. Black hole and host galaxy masses  
4.3. Possible pathways for SMBH growth  
5. Summary and Conclusion