I've been looking for this for a while now and I just haven't been able to find one. The last few that I used were:
aterm- this one was fast and had good transparency support, but it doesn't support Unicode at all as far as I can tell. The dependency graph is also reasonable.
gnome-terminal- was good, and had good transparency support plus unicode, but it pulls in about everything in gnome, and I don't use anything else in gnome. It was also somewhat slow (noticable lag in updating at times) and wouldn't use fonts that I wanted.
Eterm- same thing as aterm, good dependencies and transparency but no unicode.
Does anyone have suggestions, or will I be stuck with gnome-terminal's dependencies and slowness?