Hey! If you mean “in the last decade” modern, I suggest reading the New 52 Flash solo series from 2012. Not everything from the series was kept going into Rebirth, but the new Reverse Flash, Daniel West still exists in the current timeline.
As for Wally West, you should check out Mark Waid’s run on The Flash from 1990. The things that Wally did during the time that Mark Waid wrote The Flash are the reason why he’s the fastest speedster in the DCU. Happy reading!
Start with Flash #1 from 1987. It’s the beginning of Wally’s incredible “run” as The Fastest Man Alive. By the time you get to the end of this series, you will know that Wally West is the greatest hero in the DC pantheon.
I’m starting to think that we need a single thread with a series of Wiki posts that allow members to edit in suggested reading lists for every notable character.
If you like Wally, then I highly recommend Mark Waid’s run. If you want something more modern with Barry, I recommend reading Flashpoint and Joshua Williamson’s Rebirth run.