Any kind of plot in which uke is in a position of power. For example, uke is a king and seme is a knight of his. It doesn't have to be some kind of master-servant relationship, they can be equal rivals, but uke must be pretty powerful.
(The kind of story in which uke is a rich boy but also abused by everyone around him doesn't fit, uke's power must be real.)

There are also a few buts:
1) No outright rape/non-con (it's okay if it's dark or violent)
2) No slice of life, salarymen, teacher-student, etc
3) It has to be completely scanlated or at least a big part of it must be already scanlated.

A good example is Ryuu no Yuigon.
Thanks in advance. ^___^

Secret Diplomacy - the uke is a diplomat. It is unfortunately unfinished, but what there is of it is scanlated.

Un Carnet de Bal, also by NITTA Youka

Gokujou no Koibito - uke is older than the seme, and is his manager

Mezase Hero! - the secondary couple, whose story is in volume two, though read volume one to meet the uke. He is chief of police, as I recall, and the seme is in the SWAT team. Follow-up is Mezase Hero! dj - A Man of Many Requests.

This is all I can think of that isn't boss/subordinate.

Erotic M
the uke is masochist, but no bdsm involved.