You seem to like putting your machine under a lot of stress
I remember naively tested Chrome, Safari, and Firefox on my machine and concluded there are no significant difference between the total memory consumption. It grows linearly with open tabs.
Chrome looks scary because it has processes for every tabs and extensions, but you can keep it controlled (and Chrome's task manager gives a transparent look to that). Thankfully I am not very generous on opening tabs, so . As far as I know, Safari also spins up many processes.
I really like Safari's look. It integrates well with the OSX UI. I don't like Chrome's design (the tabs, address bar, etc.). However I can't lie that Safari often freezes randomly... my conclusion was that I'll stick to Chrome based on performance, extensions, and devtools.