Players to study

Who would you guys recommend I study for each of these agents? Needs to have lots of official matches with vods available online:
Astra
Viper
Brim (for Fracture)
Chamber
Cypher

Astra - Subroza
Viper - Aleko
Brim (for Fracture) - Subroza
Chamber - Wardell
Cypher - Cutler

Astra - vanity or redgar
Viper - easy to get impact so hard to say, maybe zombs on fracture?
Brim - not much brim gameplay for fracture yet so idk
Chamber - android
Cypher - kiles

Astra - pretty much every team runs her but good ones are peeps like vanity, zombs, link, marved, ec1s, etc
Viper - nats, chronicle, vanity, (me)
Brim - idk man chronicle and valyn ig
Chamber - mitch, net, dapr, jamppi
Cypher - nats, dapr, mitch, babyj

Viper-jammyz in iceland

astra: Easily mako dude has insane astra tech. I would also recommend vanity.
cypher: Babyj just watch his streams he always shows insane lineups.

Astra: Marved
Viper: Nats
Brim: do not know
Chamber: Andriod for traditional sentinal. Wardell aggressive peaks e usage
cypher: babj fns dapr

Astra: scream, L1NK
Viper: scream, Nivera
Brim (for Fracture): scream, L1NK
Chamber: scream, Jamppi
Cypher: scream, L1NK

mako and zunba have great astra usage, especially mako who has some really nice astra teamplay but id recommend zunba if youre more of an individual player