Recommend some lenses for 5D Classic?

Andy01 wrote:

Perhaps you could be a little more specific about what you mean regarding budget. A EF 16-35L f2.8 doesn't strike me as being a "budget" lens. Most of the lenses you mention are L series (and f2.8 at that), which are generally not the immediate go-to for budget lenses.

You could also perhaps provide some detail about what the use case is - might provide more insight into focal lengths and lens speeds.

You're right, I should have been more specific.

I'm not considering the late model/current L lenses but older used versions. I think I have answered some my own question in reading more reviews. I would like to try wide & telephoto 2.8 zooms because I haven't used them before. Willing to opt for 3rd party stuff if the build quality is decent. I'm just interested to play around and see what the technology and photo quality/experience was like from this era because I never experienced any high end gear until much later in my life (~2015.)

I'm thinking 20-35 and 80-200 are too dated. 17-35 or 16-35 v1 and 70-200 v1 will be my target. I'm comfortable to spend a little on a 70-200 as I'm interested in adapting it onto other cameras. Otherwise not interested in spending more than $300-500USD each used for a wide and standard zoom. I'm not sure if there are good 3rd party options in that price range. I don't really want to go f/4 on the wide zoom because I'm interested to see if I can replace a 35mm prime with the wide zoom and I know at f/4 I won't be satisfied in that regard.

Are any of the old Tamron/Sigma alternatives to Canon 24-70 f/2.8 & 24-105 f/4 decent? I know there is also Canon 28-70 f/2.8 but it seems a little pricey given the age. I'm open to variable aperture on a standard zoom but there are so many, 24-85, 28-135, etc. I don't know what is good or not. Everything from the (5d/6d) digital era seems to have had the 24-105 bundled. Is there a modern standard zoom with build comparable to 40mm f/2.8?