Here's a comprehensive list of veteran free agents to target after we resign the 3 key guys (Butler, Harris, and Redick).
I've removed guys who are young/unproven/fringe, and guys who I think will get more than the MLE.
Based on our (lack of) roster depth, we're going to need at least 3 of these guys to anchor our bench unit.  Preferably 2 come cheap (vet min or BAE), allowing us to use the full midlevel on 1 difference maker to be the 6th man.
That way we aren't relying on any of our young guys to be in the rotation next year, although I'll be disappointed if Thybulle isn't.
https://www.spotrac.com/nba/free-agents/PGDarren Collison
Rajon Rondo
Cory Joseph
Ish Smith
Patrick Beverley
George Hill
JJ Barea
Emmanuel Mudiay (RFA)
Elfrid Payton
Raymond Felton
Devin Harris
Derrick Rose
Shelvin Mack
Delon Wright (RFA)
Tyus Jones (RFA)
Trey Burke
TJ McConnell
Jeremy Lin
Michael Carter-Williams
SGTyreke Evans
Kentavious Caldwell-Pope
Alec Burks
Terrence Ross
Iman Shumpert
Danny Green
Garrett Temple
Jeremy Lamb
Justin Holiday
Lance Stephenson
Rodney Hood
Thomas Satoransky
Vince Carter
Wesley Matthews
SFRudy Gay
Jeff Green
Trevor Ariza
DeMarre Carroll
Wilson Chandler
Jared Dudley
Thabo Sefolosha
Luol Deng
Darius Miller
James Ennis
Rondae Hollis-Jefferson
Mario Hezonja
PFTaj Gibson
JaMychal Green
Nikola Mirotic
Al-Farouq Aminu
Anthony Tolliver
Marcus Morris
Mike Muscala
Ed Davis
Mike Scott
Frank Kaminsky (RFA)
Trey Lyles (RFA)
Jonas Jerebko
Bobby Portis (RFA)
Noah Vonleh
Maxi Kleber (RFA)
Markieff Morris
CDeAndre Jordan
Robin Lopez
Kosta Koufos
Dewayne Dedmon
Boban Marjanovic
Kyle O'Quinn
Nene 
Brook Lopez
Ekpe Udoh
Zaza Pachulia
JaVale McGee
Tyson Chandler
Nerlens Noel
Joakim Noah
Kevon Looney
Khem Birch (RFA)
Jordan Bell (RFA)
Thomas Bryant (RFA)
Enes Kanter
Salah Mejri
Pau Gasol
Andrew Bogut
Who do you see us realistically getting?