There are some important springers from Engand and Germany. I'm not knowledgable to know exactly which ones ... but surely some BSA's are significant. HW and Diana's
BSA meteor, SHeridan (supergrade A/B ) I find magnificant examples or quality and are hightly collectable. And the Silver /blue streak as mentioned set a standard for a decent pumper for the masses.
Sharp rifles set high stds for a quality rifes and are still in prodcution , very hard to obtain new.
Air arms seemed to develop or grow in popularity quite well.
I like the Jackals , for better or worse I find them interesting air guns unlike anything before.
A Howa 55G might set the mark high for a quality Co2 rifle.