Which Arduino with wi-fi is truly available?

Hello, I am new to Arduino (although experienced with electronics and coding) and am having trouble choosing the right board for my project.

I know I will need wifi capability and the full-size form factor (to accept one additional shield I know I will need). I keep finding boards on Arduino.cc that have been “Retired” or are “Sold Out.” (This includes the Uno Wifi, Yun and Tian.) Plus, Arduino seems relaxed about keeping their website up-to-date (and fixing “page not found” problems). Please… can anybody refer me to an active Arduino board that includes wifi AND accepts standard size shields? (I see mention of a “wifi shield” on the forum but I can’t find it on Arduino’s Product Page. Besides, I’d prefer not to have to stack TWO shields in my project.) Thank you very much!