I've found most "brand name" tuners these days are of pretty decent quality. Like others, I'd rate the Wilky's and Grover's at about the same level of acceptable while at the top end of the scale are Schaller and Sperzel with Gotoh's somewhere in between.
Just beware of the no-name and the "economy" tuners that some suppliers are selling. The quality of those can be really hit or miss.