Across 869 ranked games on patch 16.21 in Master and above, Tryndamere mains win 53.4% of their games in the top lane.
Their most common build appears in 45.3% of those games and wins 52.0% of its 394 games.
It starts 
two Health Potions and 
Doran's Bow, completes 
Ravenous Hydra, 
Yun Tal Wildarrows, 
Infinity Edge, 
Serylda's Grudge and 
Endless Hunger in that order, and takes 
Berserker's Greaves.
Three other builds are played often enough in the top lane to be measured on their own.
In the top lane, Tryndamere mains fare best against 
Ornn (won 76.5% of 17 games), 
Irelia (won 78.6% of 14 games) and 
Camille (won 76.9% of 13 games).
Their hardest matchups, the champions that counter Tryndamere, are 
Gangplank (won 25.0% of 16 games), 
Fiora (won 40.0% of 20 games) and 
Warwick (won 36.4% of 11 games).