The rest of the Canadian St. Laurent derivative classes:
The
Restigouche-class ASW destroyer was the second batch of seven
improved St. Laurents that served the RCN from the late-1950s to the late-1990s. They didn't get the helicopter update of the St Laurents, so the three that weren't updated to the IRE standard, were withdrawn by 1974.
Four got the IRE update that included an aft ASROC launcher in place of the gun, new sonar and mast.
Out of those four, two got refitted with Harpoon ASM missle launchers instead of the ASROC and a phalanx CIWS, to serve in the first Gulf war in 1990.
All four were decomissioned between 1994 and 1998.
https://en.wikipedia.org/wiki/Restigouche-class_destroyer
Four of the up-gunned Restigouche Mackenzie class served between 1962 and 1993. They had twin barrel front mounts and torpedoes.
https://en.wikipedia.org/wiki/Mackenzie-class_destroyer
Furthermore, two additional Mackenzie class destroyers were finished with the St. Laurent's helicopter hangar and served between 1964 and 1998 as the Annapolis class.
https://en.wikipedia.org/wiki/Annapolis-class_destroyer
Most of the above got new electronics and torpedoes as part of the 1980s DELEX refit.
Their early adoption of helicopters is their main advantage. Despite their excellent saiiling properties, with the exception of the two Gulf refits, all of them were limited to the ASW role, posessing minimal to no real anti-ship or anti-air capability.
Iroquois class next.