Ligonier Ministries has a list and discussion of their top five commentaries on Luke. I would generally agree with the list but I would not rank Nolland or Morris as high. And I would place Fitzmyer in the top five. To the runners up I would add Craig Evans (NIBC), Bovon, Liefeld (EBC),Talbert, and Tannehill. In any case, the top five they have listed are:
1. Darrell L. Bock -- Luke 1:1-9:50; Luke 9:51-24:53 (Baker Exegetical Commentary on the New Testament, 1994, 1996).
2. Robert H. Stein -- Luke (New American Commentary, 1993).
3. Leon Morris -- Luke (Tyndale New Testament Commentaries, 1988).
4. John Nolland -- Luke 1:1-9:20; Luke 9:21-18:34; Luke 18:35-24:53 (Word Biblical Commentary, 1989,1993, 1993).