The dynamic of Shin Hongo and Shin Ichimonji reminds me of Kouga and Rei from GARO.

The AUGs of the Shin Kamen Rider movie remind me of Garo's Horror.

GARO is known for their awesome choreography so if you enjoy the fight scenes of the movie then this series would be a treat.

The factory fight of Ichigo and Nigo has the perfect equivalent.

First impressions, the humor and team makeup of BLAZAR remind me of Shin Ultraman.

Maybe it's because they both take heavy inspiration from Showa Era Ultraman.
I've only seen ULTRASEVEN (watching it in tandem with Blazar's broadcast) but the episodes that range from goofy to scifi thriller with that ever looming threat of Kaiju felt similar.

The 2014 drama Bad Guys was the reason I was intrigued by Hello Monster, due to the similarities between Pyscho-chan and Lee Jun Yeong. Not mention Lee Hyeon's career as a profiler had been my ideal for Lee Jung Moon.

Both involve younger guy, older woman relationships though their approach and intent about it is different.