It doesn’t surpass it, but ue seems to at least be a modest little brother to ough. It can represent:
- \-yoo\: argue, cue, ensue
- \-oo\: glue, true, sue
- [silent]: tongue, morgue, vague, the Hague
- \-way\: segue, suede
(This is just looking at the cases where it really is functioning as a unit, omitting examples like truer and queer, where a phoneme straddles its boundary.)
[Inspired by the comments here.]
