The following results only take into account medals earned from 2010 to 2019, of course.
1) Arhur Zanetti (artistic gymnastics) - world champion, Olympic champion, Olympic silver medal, 2-time Pan American Games champion
2) Cesar Cielo (swimming) - 1 Olympic bronze medal, 9-time world champion, 4-time Pan American Games champion
3) Isaquias Queiroz (canoe sprint) - 3 Olympic medals, 6-time world champion, 3-time Pan American Games champion
4) Mayra Aguiar (judo) - 2 Olympic bronze medals, 2-time world champion, Pan American Games champion
5) Ana Marcela Cunha (open water swimming) - 5-time world champion, Pan American Games champion
6) Arthur Nory (artistic gymnastics) - world champion, Olympic bronze medalist, Pan American Games champion
7) Ana Sátila (canoe slalom) - world champion, 3-time junior world champion, 3-time Pan American Games champion
8) Hugo Calderano (table tennis) - bronze at the World Tour Grand Finals, bronze at the Youth Olympics, 4-time Pan American Games champion
9) Marcus D'Almeida (archery) - silver at the World Cup, silver at the Youth Olympics, cadet world champion, 2-time Pan American Games medalist
10) Fernando Reis (weightlifting) - bronze medal at the junior world championships, 3-time Pan American Games champion (and he could also inherit a bronze medal from the 2018 World Championships if Rustam Djangabaev really gets disqualified)
And a special mention to Brazil's rhythmic gymnastics group (gymnasts vary) - bronze at the World Cup, 6-time Pan American Games champions