Most like the FA-50 over both, everyone in the region is getting it, it’s next version is getting AIM120 so it’ll have BVR too. Tejas is less likely due to the above mentioned reasons + Israeli parts. FA-50 similarly has Israeli parts but less so, that might be the one demerit of FA-50 for Malaysia, but they might not care.
JF-17 is good but China and Malaysia are at odds recently, the sale might be hampered by that. Especially since all the weapons/munitions are Chinese on it.
It’s still anyone’s game but I’d say FA-50 is most likely.