I did a similar exercise for Gaon sometime back, and did combine JBJ with Busker.
G-D with Bigbang.
My thought was they were the primary carriers of the group, so are better considered together.
I didn't do so for Taeyeon because lot of her success came after SNSD's peak periods.
ThreadGaon Weekly top 100 Digitals 2010-21 RankedMethod:
Top 100 weekly digital so 5200 songs per year,5100 in 2010. - 62300 spots.
#1 gets 100 points, #100 gets 1 point.
Add up by each act, for the whole year. Most points indicate which group was consumed most that year.
That could include songs from the past years as well.
* Yes absolute ranking is not as accurate in showing the popularity of a song was digital points will.
Since differences between ranks won't be uniform, Song #2 on Week2 might be 10 times more consumed than Song #3, whereas in…
Jang Beom June with Busker Busker is kinda similar to the cases of Bol4 and 10cm. Their vocalist is primarily the reason for the success of their duos and that even if the other member leave the duo, people listening to their new songs wouldn't notice the difference.
However, I don't think that is the case for soloists from kpop groups. Especially for groups with other popular members. Listeners would notice the absence of the other members.