Accounts Connected:

1 tobeaj2mer01 - Legendary account giving merits to his alts bellow
2 NeverArgueWithWF
3 fot99961
4 xgb49048
5 ueb29304
6 bse86074
7 Tom0067
8 wenwei224084
9 chenshan319779

Proof:

Main account, legendary rank tobeaj2mer01 has very suspicious merit activity. Most of the time, he sends merit to the same account two times in a row on the same day within just 2 minutes. Most account he sends merit to are very new and their names follow common pattern - short name or just 3 letters and than some random number behind. Many accounts received 10 merit which is enough for Member rank so he is probably farming accounts. These accounts also send merits one to another.

Let's look at each account:

2 NeverArgueWithWF - received 33+17 merits on April 11 from tobeaj2mer01. This post received 33 merit and it's actually a copy-paste from here: https://zhuanlan.zhihu.com/p/35406120
3 fot99961 - total of 10 merits received from tobeaj2mer01, xgb49048 and bse86074
4 xgb49048 - total of 12 merits received today, all from accounts listed here. Then sent 5 merits back to these alt accounts.
5 ueb29304 - 8 merits received from tobeaj2mer01
6 bse86074 - total of 10 merits received today, all from accounts listed here. Then sent 5 merits back to these alt accounts.
7 Tom0067 - total of 7 merits received today, all from accounts listed here.
8 wenwei224084 - total of 6 merits received today, all from account listed here. Then sent 3 merits back to one alt account.
9 chenshan319779 - 4 merits received from tobeaj2mer01 for semi-copy-pasted post

There are other accounts, for example https://bitcointalk.org/index.php?action=profile;u=1903494 but I got tired of writing everything here.

Related Addresses:
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Miscellaneous:
It's clear that accounts are connected, but I think you should also perma ban them, including Legendary account, because that Legendary account is giving merit for posts that are plagiarism, for example
https://bitcointalk.org/index.php?topic=3343167.msg34981873#msg34981873 (proved by max2607 in comments),
another copy-paste https://bitcointalk.org/index.php?topic=3335754.msg34888124#msg34888124 (original article: https://bihu.com/article/225731),
gave merit to this nonsense post probably generated by bot https://bitcointalk.org/index.php?topic=3343225.msg34982792#msg34982792 and so on and so on