DuckDuckGo (Bing) and Startpage (Google) work fine for me 90% of the time. To keep things mixed up, my new browser tabs use Startpage, while DDG is the homepage. The !bang syntax at DDG can be especially handy, and Startpage provides a proxy for every link. Both search engines allow you to set up a personal URL, or cookie, with your custom settings (appearance/features/privacy/etc.). Simple and handy, not a giant Orwellian beast that's tracking my every move.

Like others have said, Google doesn't seem all that great these days (better flush that browser cache before searching!). The 10% of the time that the others don't provide adequate results, Google doesn't either. I've gone from instantly hopping over to Google when the alts don't provide good results, to adjusting my terms a few times before finally trying Google.

Google still works best when I want to buy something, which isn't surprising.