Here's a few quotes:

Instead, the remarks by Comey — a Republican with a sterling reputation among leaders of both parties — delivered from a lectern at FBI headquarters cast fresh doubt on Clinton’s own fitness and trustworthiness.

- https://www.washingtonpost.com/politics/even-without-charges-fbi-rebuke-leaves-a-heavy-political-cloud-over-clinton/2016/07/05/79b6f712-42c8-11e6-bc99-7d269f8719b1_story.html?hpid=hp_rhp-top-table-main_clintonemails-510pm%3Ahomepage%2Fstory

Comey proved his independence during the George W. Bush administration when, as deputy attorney general, he headed off White House officials’ efforts to persuade John Ashcroft to reauthorize a domestic surveillance program while the then-attorney general was recovering from surgery in a hospital intensive-care unit. On Tuesday morning, Comey proved the point again. He is no team player, which in this setting is no criticism — it is a high compliment.

- https://www.washingtonpost.com/opinions/why-comeys-remarks-on-the-clinton-email-case-were-extraordinary/2016/07/05/b964813c-42e0-11e6-8856-f26de2537a9d_story.html

FIRST, A shout-out to the investigator: In examining the use of a private email server for official business by then-Secretary of State Hillary Clinton, FBI Director James B. Comey appears to have navigated treacherous waters with the commitment to principle and rule of law that any citizen could wish for. The FBI investigated thoroughly. It came to its conclusion in time for voters to factor it into their deliberations. Mr. Comey leveled with the American people, reporting to them even before reporting to his own bosses.

- https://www.washingtonpost.com/opinions/clinton-was-extremely-careless-that-is-not-a-crime-but-she-must-do-better-in-the-future/2016/07/05/d85ba064-42d8-11e6-8856-f26de2537a9d_story.html

Just because Hillary supporters didn't like Comey's conclusions (nor, by the way, did Republicans) does not mean those conclusions were flawed or partisan.