It is hard to say, which species is the best in imitating human talk; parrots, like the grey African parrot, the common pet parakeet or budgerigar, corvids like the magpie, raven or crow, further macaws like the aras, the hill myna, the Eclectus parrot, Amazons, Indian and other parakeets, cockatoos, keas, etc. are often cited as excellent "talkers" and noise imitators.
According to amateurs and professionals, the African grey parrot and the budgerigar are in the lead, closely followed by "representatives" of various bird families, i.e. psittacidae, i.e. Aras (macaws), Eclectus parrot, Amazon parrots, Indian ring and other species of parakeets, cockatoos and cockatiels, keas, etc., sturnidae (hill myna) and corvidae (magpie, raven, crow), and, sometimes, jays (corvidae), or lyrebirds (menura), who are imitating various noises ...
As I knew a grey African parrot (owned by a neighbour, with an impressing vocabulary) and some speaking budgerigars (one at school and some belonging to acquaintances), cited them as best, but I also heard several times ravens and hill mynas.