SearxNG 
Open source metasearch engine that gets results from over 70 search engines. only thing i don't like about it is the "Engines cannot retrieve results" error you get sometimes, but other than that its pretty good.
4get 
Privacy respecting and lightweight metasearch engine that doesn't suck [1]. You can choose which search engine to get results from,
one neat thing about it is it doesn't require JS for it to be usable.
They also have an onion domain which is pretty cool.
Mojeek 
A good search engine with its own search index that doesn't censor based on politics [2].
Hearch 
"Hearchco (/hɝːtʃko/) is a distributed and fast metasearch engine that respects your privacy." [3] Idk much about this search engine but sounds pretty cool i guess, it uses Duckduckgo, swisscows and some other search engines for its index. 
I also like the simplistic layout of the site, and especially love the cute hamster on the front page ^_^. that alone makes it a 10/10 search engine for me.
Wiby 
Interesting search engine that indexes Personal/Oldschool websites, also very lightweight.
YaCy (my favorite) 
Decentralzed and P2P search engine software with its own uncensorable search index (so you aren't subject to government/corporate censorship like on google, bing, or other mainstream engines).