Les Amis ranked by how many lines they get in the Brick
(counting every time we get a line in direct speech, including one-word lines in dialog and such)
Enjolras : 124 lines, including two (2) longer speeches. Most of these are him giving orders, with many brief instructions during the barricade chapters. Althrough his words only would seem to shape out an inflexible and severe character (e.g. in the way he adresses Grantaire or how quickly he kills Le Cabuc), he is the one whose actions and behaviour are the most described, which allows him to be seen beyond these harsh words (telling Combeferre "it must be done" before killing the artillery-man and being shown crying as he does so). Ultimately his lines also make him a sensible and humane man, as shown in his declaration after killing Le Cabuc, but most of the time the words of the "revolutionnary leader" prevail.
Courfeyrac : 99 lines. A solid third of these are from his "Do you have any money ?" dialog with Marius, and he is the one who gets the most jokes and overall huromous lines (including "I met Marius's new hat and coat, and Marius was inside" and him adressing the army's cannon). However, his lines also show a more serious and caring side of his character as he serves as Enjolras's right-hand man during the barricade chapters, and is the first one to notice Gavroche being outside the barricade.
Bossuet : 64 lines. He is the first of them who gets to actually speak, as he encounters Marius in front of the Musain. He gets lines before and during the entirety of the barricade chapters, usually to comment on the situation or join Courfeyrac in clever quips and sarcasm,his last line known being "where is your hat ?" at the heart of the final battle.
Grantaire : 60 lines, including two soliloquies as he is explicitely said to be drunk (the first one at the Musain, interrupted by Bossuet, the second one at the Corinthe interrupted by the arrival of Navet). A good 20 out of these are when Enjolras overhears him playing dominos at the Barrière du Maine, and he gets two lines seconds before his death - including, of course, "Permets-tu ?"
Combeferre : 28 lines, the most famous of which is without contest "to be free". He is the only one who gets a solo song, and also holds one of the longest speeches when he tries to convince some men to leave the barricade. As Combeferre is not much seen in action, his lines help establish him as a knowledgeable (comments about the mechanism and history of the cannon) and very humane character ("He could be your brother")
Joly : 18 lines. Almost all of these are covered in only two chapters, the first conversation being the one with Bahorel at the Musain and the other his meal with Grantaire and Bossuet at the Corinthe during Lamarque's funeral.
Bahorel : 14 lines. He is mostly seen and heard on two occasions : giving advice to Joly about Musochetta, and being among the most enthusiastic before the barricades, which immediately gets him Gavroche's respect.
Jehan : 4 lines, and that is if you count the song he is said to be singing with a few others at the beginning of the barricade chapters. Aside from Grantaire, he is the only one to get lines right before his death, which are only given to us as overheard by Enjolras and Combeferre.
Feuilly : 4 lines. Probably the Ami who gets the least mentions overall, as he isn't present during the first scenes at the Musain. The first time we hear him speak is in the last part of the barricade chapters, as he answers Enjolras "in the name of everyone". His only line aside from that is him lamenting the absence of absence of generals who abandonned them.