This is a really useful site https://www.travelcodex.com/award-maximizer/ it certainly doesn't cover every airline's frequent flyer program, but it does cover most of the transfer partners for Chase (UR), Amex (MR), Citi (TY), and Capital One (VR).

Unfortunately you'll quickly find that there aren't many great options for you. Everything is going to be in the 80-100k range each way for business class, so 120k points isn't quite enough to get you there and back. The only partner that doesn't show on there is Emirates, but they are still in that same range for business class, and a whoping 350k + miles for First.

You might consider flying one-way on miles and one-way on a revenue ticket. If you hunt around there are some decent deals for business class to USA from SE Asia (probably not KUL, you'll want to check all the major airports in the region, CGK, BKK, HKT, SIN, CMB, SGN to name a few)