I've read a few series here and there, but I decided it's time to finally explore the genre more. However, I'm having a hard time trying to find any in English. So, I would appreciate it if anyone could recommend me their favorite series. The only request I have is no anthro please.

Thanks in advance!

Do you want real bara which is written by and for gay men, or bara-like yaoi?

I'm not really into real bara, but here are some mangaka who write it:
FUJIMOTO Goh
HIMATSU Shibuki
JIRAIYA
MATSU Takeshi
MATSUZAKI Tsukasa
Mentaiko
MIZUKI Gai - I like his Tiger & Bunny doujinshi
Ron9
TAGAME Gengoroh
TAIRA Raizou

If you want bara-ish yaoi, try these:
Bachi Bachi (KIJIMA Hyougo)
Giocatore, Hokaku Keikaku.
Hide and Seek
Sailor Danshi
Senya Ichiya - Shitone no Himegoto
Tango no Otoko