Brittney Griner (USA)
lisdexamfetamine, 01 Oct 2015 to 30 Sep 2019 (4 years), granted 28 Oct 2015 (27 days retro). This drug treats ADHD, binge eating, etc.
John Conger (USA)
dextroamfetamine (Adderall), 2x/day, 22 Feb 2016 to 22 Feb 2020 (4 years), granted 25 Feb 2020 (3 days retro) by USADA, FINA 10 Mar 2016.
McQuin Baron (USA)
dextroamfetamine (Adderall), 15 Jan 2014 to 23 Aug 2015, granted 24 Jan 2014 (9 days late)
dextroamfetamine (Adderall), 01 Jun 2015 to 01 Jun 2019, granted 04 Jun 2015, USADA 30 Jun.
Sam Dorman (USA)
amfetamine (Adderall), 10 May 2013 to 10 May 2017 (4 years), granted 12 Jun 2013 (a month later)
And of course, Biles from before. How many non-USA athlete have an ADHD-related TUE?
Further reading: A True ADHD Epidemic or an Epidemic of Overdiagnosis?
http://www.psychiatryadvisor.com/adhd/a-true-adhd-epidemic-or-an-epidemic-of-overdiagnosis/article/429034/