The Taric Rework brings new strengths and weaknesses. Some of the previous Counters still work really well. Taric Counters like Morgana and Tahm Kench, are still strong.
The taric rework brought with it, AOE Stun perfect for team fights. however with the right items and or champions, that stun can be ineffective against carrys. A good taric counter involves taking away what makes the new taric strong, mainly his ability to set up plays with his stun.
Taric Champion Counter
Some support head to head are strong taric counters, the best champion counter is alistar. Heal to match that of taric, as well as the means to stop taric from making use of his ability’s. Morgana does fairly well versus the New Taric Rework, mainly due to her E magic shield.
Other notable Counter Picks are Gragas, Using your gragas Ult right before Taric Ult is a effective trade. If your looking for a more direct counter pick, the trundle is your champion. Pillar can catch out taric along with the ability to steal his tank stats. Since the New Taric Rework is using his armor stat to help with damage, you are also lowering his damage as well with Trundle Ult.
Taric will spend a lot of his time Shielding and AOE Healing his team. When he is not doing that, he will be preparing his AOE Stun. This can be a problem for some ad carrys, while other like sivir not so much. For those who would struggle against a Stun, Building the right items is important.