I'm trying SearX today, after so many recommended it. It looks promising! Thank you for pointing out the multiple-engines setup.
One possible drawback: it seems I can't do "verbatim" searches; or at least, quotation marks don't seem to lead to verbatim searches β I'll try with "+". DDG was adamant with quotation marks, that's something I liked a lot about it.
Didn't know about several of these, cheers!