I work in a PC repair shop and I run my tool stick on this way. By the way, you can just put a folder in your Ventoy and store non-iso files so you can have portable apps and so on.

• Acronis (can clone to reduced size drives unlike clonezilla which can only clone to equal or bigger)
• MemTest86 & MemTest86+ (+ is the FOSS one. Recommend both because sometimes one won't work)
• Don't forget that you can put other stuff in a Ventoy, not just .isos. I have shitlods of utilities in a folder beside all the .isos.
• Tons more but I just woke up for work. I will make this list much longer when I get there of I can remember to

Edit: ADHD did ADHD things. Here's some more stuff. A lot of it is Windows-centric because that's what we specialize in. ISOs:

• PC Unlocker (Windows password remover, paid)
• Gandalf's Windows Preboot (similar to Hirans, but modern. Paid.)

Utilities:

• CrystalDiskInfo (SMART checks and more on SSDs)
• CrystalDiskMark (SSD benchmark)
• FastCopy (Windows copy utility. Free)
• HDTunePro (v5.00 specifically. After this, license binds to a single machine. HDD SMART checks, benchmark, secure erase, sector scans, and more.)
• OCCT (CPU, GPU, Memory, PSU, and other checks and stress tests. Top-tier tool.)
• F6 Drivers (drivers for NVMe detection on some laptops)
• Spacesniffer (visual representation of disk utilization. Similar to WinDirStat, but looks nicer/runs quicker imo. Free.)