Besides halacha, are there any latter day achronim who are generally accepted i.e. like once in a generation.

By definition, hashkafa or non-halachic works are more subjective and you should try, different rabbanim, with the help of the internet, in order to find the one that really speaks to you. From my experience, the thought of Rav Kook and Rav Soloveitchik "speak to" the modern mindset and understanding more than most, while others may connect more with the Lubavitcher rebbe, Rav Dessler, Netivot Shalom or R. Nachman of Breslav. "Universally accepted rabbanim" like R. Moshe Feinstein, R. Sh.Z. Auerbach, R. Osher Weiss, by definition, generally deal more with halacha, for it's davka on hashkafic issues where "directions" part, where the "classic" or "universal" contradicts the subjective, innovative and maverick (e.g. hassidut, Zionism, mussar, philosophy...), which are generally, more appealing, but again, more subjective.