Volibear and Poppy are pretty fearsome.
Voli chases and flips the enemy then poppy knocks them into the wall. He knockback is extremely effective in TT because the lanes are more narrow. Then between being slowed, Poppy's Q, Frenzy they do quite a bit of damage.
They can survive for a long time also because Voli stacks health and has his passive, I usually take heal also lol. The person who plays poppy with me also stacks a lot of armor in the beginning of the game letting us harass without taking to much damage.
Overall fun to play. Chase, flip, knockback, then dead haha.