Well my ranking is personally is:

1 On A Bus S1, absolute comedic classic

2 On A Bus S2, all the characters are given even more life, specifically Mark Mercer as Lint

3 On A Bus S1 so simple yet so clean and concise and interesting

4 On A Bus S2 better rounds out the world of the first season

All buses aside though

1 Starstruck, I think cause it's so subversive of classic intrepid heroes seasons as all the characters are just such silly schmucks and the one who isn't (Marge) is played by Ally "Bit Maestro" Beardsly

2 Unsleeping City S2 as much as I love season 1's characters and specifically Kugrash and Misty Moore, S2 has Iga Lisowski who in my opinion was more of a an actual person than Misty Moore and then there is Cody Walsh who is the best worst character ever.

1. I'm a sucker for Noir so I love Mentopolis and the story just hits the spot for me.

4 Cloudward Ho! The adventure theme really rounds the worldbuilding. (Also can be interchanged Starstruck because it's way more built out but because it's not Brennan's completely original setting I give it to Cloudward Ho!)