Here's the ones I know:
ANH:
1. Governor Tarkin
2. Tagge ("until this battle station is fully operational,")
3. Motti ("you're sad devotion to that ancient religion"...)
4. Daine Jir ("She'll die before she'll tell you anything.")
5. Nahdonnis Praji ("There were no life-forms aboard.")
6. Hija ("There goes another one.")
7. Bolvan ("Hold your fire.")
ESB:
1. Admiral Ozzel (the officer whom Vader chokes when the Imperial Starfleet arrives at Hoth)
2. Admiral Piett (Vader's Admiral following the choking of Ozzel.)
3. Captain Needa (Vader "accepts" his apology.)
ROTJ:
1. Jerjerrod ("We shall double our efforts.")
2. Piett
3. Gherant ("We're not going to attack?")