Kanye West vs Lil Wayne

2017 Best Rap Performance · 59th Grammys
Lil Wayne
2017 Best Rap Song · 59th Grammys
both lost to Hotline Bling
2016 Best Melodic Rap Performance · 58th Grammys
both lost to These Walls
2016 Best Rap Performance · 58th Grammys
both lost to Alright
2013 Best Rap Performance · 55th Grammys
Kanye West
2013 Best Rap Song · 55th Grammys
Kanye West
2012 Best Melodic Rap Performance · 54th Grammys
Kanye West
2012 Best Rap Album · 54th Grammys
both lost to My Beautiful Dark Twisted Fantasy
2012 Best Rap Performance · 54th Grammys
Kanye West
2012 Best Rap Song · 54th Grammys
both lost to All of the Lights
2009 Best Melodic Rap Performance · 51st Grammys
Kanye West
2009 Best Rap Performance by a Duo or Group · 51st Grammys
both lost to Swagga Like Us
2008 Best Rap Performance by a Duo or Group · 50th Grammys
Kanye West
2006 Best Melodic Rap Performance · 48th Grammys
both lost to Numb/Encore

Ballot lines that credit both of them — the same nomination, not competing entries.