there are no best wheels, stop asking what gear is the best cause it's all preference, but general consensus is that 90% of otangs freeride wheels are chattery and overpriced. kegels are good for DH/Push though.
for freeride there's way too many wheels to list
for downhill, kegels, cannibals, advantages, royce's and bigzigs are dope.
for push, speedvents, flywheels and hotspots are rad
for tech sliding, slide a's, sublime powerslides, and mini logos are great
for street and park, formula 4s and any bones wheels will do the job well.