While the Suns seem more interested in potentially shedding the contracts of Tyson Chandler and Jared Dudley at this point, each with two years remaining and thus under contract for a combined $23M+ in 2018-19, the only non-future-core player who could potentially give Phoenix a first round pick in return is Alex Len.
Now, I will say this: I do not believe that Len will be traded until the deadline in February. At this moment the season is still too young and a team that might be willing to flip a first round pick for a rental of the young center will want to see several months of proof that he will be a solid and consistent enough player for them down the stretch and into the playoffs.