Based on the available information regarding who in BTS is good at forging friendships, the members can be ranked as follows:
Jin, RM, Jimin, Hobi, Suga, V (Tae), and Jungkook (JK).
This ranking, from highest to lowest, reflects their perceived ability to easily make new friends and connect with strangers. It is important to note that this is based on a specific subjective assessment and does not necessarily reflect overall friendliness.