A Look At Linux Application Scaling Up To 128 Threads
7-Zip is one of the most common programs for either Windows or Linux users that continues scaling well at least through 64 cores while with the SMT enabled hadn't helped the performance.
Stockfish is one of the chess engines that does scale really well for modern CPUs.
The Assembly-written asmFish is another one of the tests scaling well on this dual AMD EPYC 7601 PowerEdge server.
The ebizzy synthetic benchmark that aims to model server workloads does scale fairly well and does see a nice boost from SMT at the end.