For the new API SN conventionals:
#1: PYB. Strongest add pack (high TBN, high Moly).
#2: QSGB. Great add pack w/Moly and good starting TBN.
#3: Tie between Formula Shell and Havoline. FS is almost identical on paper to QSGB, but Havoline has a good add pack and good strong starting TBN (only complaint about Havoline is its a bit on the thin side).
Honorable mention: VWB, GTX, MC5K. I like my sodium in my food, not my oil.