Seven of Nine, not typically effusive in her praise, certainly thinks so. Frankly, her opinion is about as unbiased as you can get.
SEVEN: I was speaking professionally. I often work with him on navigational problems. He [Paris] can be an erratic individual, but he's
also a very competent officer and clearly a skilled pilot.
For the record, in the same episode Tom comes within a whisker of winning the 'Antarian Trans-Stellar Rally' (against fierce competition from a dozen other planets) so he's clearly no slouch, even by the standards set by other races and racers.
Additionally, Tom's official Bio on the StarTrek.com website notes his piloting skill not once, but three times, including an official commendation from Janeway.
He did hone his natural aptitude for piloting skills on craft large and small and proved adept at holo-engineering.
Janeway: ... Given a second chance, he has stood tall, not only keeping the ship safe through his piloting skills but counseling Torres through the wrenching division of her soul and saving his onetime Maquis enemy Chakotay, though his stint as an aide to the EMH Doctor was short.
Having said that, Tom fails to pass Ledosian Flight School. Pilot-Instructor Kleg refers to him as being merely adequate before flunking him for feeling the need, the need for speed.
KLEG: I am sorry to inform you, Mister Paris, but you have failed this examination. You will no longer be allowed to operate a vessel within Ledosian space.
Voy: Natural Law