You don't need a starter.
Be carefull when sizing the VFD, it can be constant torque or variable torque.
Also I recommend a line reactor. I lost two expensive ($6,000) VFDs before I installed a line reactor and a $2,000 TVSS.
And I agree call a tech rep. There are many mfgs of VFDs some are OK, a couple, Danfoss and AB lead the rest.