Not FOSS, but I can highly recommend Davinci Resolve. I actually have come to prefer it over Premiere and Vegas which have been my favorites for over a decade now. Compared to those two, it just feels like a much more modern, well polished product. The stability is what has really sold me after having to save Premiere and Vegas projects after nearly every edit because I never knew when they would randomly crash. Its free license gives you just about everything you will need and the multiplatform support is great. I really recommend you give it a try and see how it suits you.