To say categorically the Chayei Odam is not the Yeshiva Olams posek is simply a lack of Knowledge. Much of the litvishe Olams Mesorah is based on the Chayei Odam/Chochmas Odam (one and the same, ask anyone whoi has learnt Hilchos Niddah.
Besides For the Seder Hayom that I have qouted before I would add the Ben YeHoYado (ben Ish Cjai) as one who learns the Gemora K’pshuto. Look it up ( Ben Yehoyada is perhaps the primary mefaresh of Aggadita)