SLES

Two names stand out when it comes to Enterprise Linux Sever market: Red Hat with Red Hat Enterprise Linux (RHEL), and SuSE, offering SUSE Linux Enterprise Server (SLES)

Both support ARM64, x86-32, x86-64 and Power Architecture, and they are both suited for servers, mainframes, and workstations, both have HA configurations and long support lifecycle of 10 years or more

Tools like YaST are the reason why SLES is known to have a less steep initial learning curved compared with RHEL, but then, both serve the enterprise market well, which means: