Which of the following component package types have the least parasitic effects at frequencies above the HF range?
Why Every wire lead on a component acts as a small inductor (roughly 20 nH per inch) and adds stray capacitance, and those parasitics matter more as frequency rises because inductive reactance grows with f. Surface mount devices have essentially no leads: the body solders directly to the pads, so lead inductance and stray capacitance are minimized. That is why VHF, UHF and microwave circuits are built almost entirely from SMT parts.
Watch out Axial and radial lead parts, and the TO-220 power package with its long pins and metal tab, all have wire leads and bulky bodies that add inductance and capacitance right where you least want it above HF.
No leads, no parasitics. Above HF, go surface mount.