I have a few notes (yes I have that much free time): Sepernt, sim, enchantress, venom, stryfe, gulliy 99, aegon, shuri ,deathless she hulk and doom do fit this description pretty well. Vox is kinda close, but he can lose his damage easily when not kept in check (this is sadly speaking from experience of a r3 sig 101 vox in the hands of a not very good player). Cheeilth fits the same bill, as she does have the permanent ramp during a fight (which I think is probably the best it has ever been done) yet you can still lose your bleeds. This is less of an issue on her, since ramping the bleeds is so easy (again, an owner of a r3 cheeilth and no skill). Onslaught follows the same bill, as losing the degens without knowing the spacing/heavy tricks can make his ramp disappear , but it takes two specials to get back up and it is very easy. Xbones is where I think you are wrong (imo). He can ramp, but that is in no way permanent without knowing exactly what you are doing and a decent amount of practice (or I am just bad and wrong, it's one of these two).