So...based on all the names that have been brought up as possibly looking for a new home next season, the one guy that I consistently come back to is this guy right here (already mocked up in blue and orange):

Rumors are right now that the Rockets MAY be looking to move Westbrook due to poor fit concerns with The Beard. The Knicks have been rumored to have been interested in Westbrook on numerous occasions in the past. Westbrook is a Derrick Rose like lead guard, probably about as close to Rose when Rose when in MVP shape as you can get. The Rockets did not exactly give up the farm to get Westbrook (2 future 1st round picks and 2 pick swap options but also got OKC to take CP3's giganto contract) so it's reasonable to justify that it would not take the farm for another team to acquire Westbrook. Westbrook would give the Knicks the best PG they've ever had since Clyde Frazier (even at this point in his career). And of course Westbrook can also help this team win as much as probably CP3 would.
Personally I think IF the Knicks do go with a big name, big dollar point guard (not that it would be my ideal scenario) maybe getting the Rockets on the phone and working out a deal where the Knicks acquire Westbrook. Westbrook is a shoot first point but he's also been top 3 in the league in assists per game for 4 of the last 5 years and is generally considered an excellent passer with great court vision. Westbrook is also about as intense a player as you can get so as an "example guy" of how you need to play he's it. And unlike CP3, Westbrook will still be in his prime for the length of his Super Max contract (also 3 years left on it). The contract likely will eat up a giant chunk of the team cap but what it does is it'll give the Knicks a legit lead guy while their young players develop that can make NY back from the dredges. Maybe not a championship team (due to the cap clogging contract that Westbrook) but unless the Knicks really believe they can be championship caliber in 3 years (let's be realistic here) maybe Westbrook would be your best bet get that can both perform and impact.
Trade for Westbrook and then use that 8th pick for a shooter (Vassell) or a defensive wing (Okoro). Then you have more freedom to move Randle for anyone that has best value instead of having to try to get back a PG in the deal.