You have to stop listening to all these so call SEO experts with something to sell!! This is just plain Bull Squirt! Stop buying what these SEO parroting idiots are selling. It is a fools errand to chase all this stuff. Just make a site that is honest and people enjoy. That is all you need to do.
Yes. There are [****** - lousy] links. And yes. There are people who make crappy links.
But let's not over think this!
Unless your link profile is loaded with really really spammy links, and that is almost impossible unless you are a spammer, then "no" there is no invisible line you cross, and you do not have to worry. The link examples you provided will pass muster just fine. Google is not Mother Superior ready to bludgeon you to death with a ruler in some Monty Python movie for links someone else makes. Sure some links are not optimal. Some down-right [**** - are lousy]. But this is where you take control.
You need to create your own back links that are natural. The best links possible are within content. The examples you provided seem a bit contrived. Google wants natural writing and natural links. Just do what you do. You do not have to worry about going over the edge if you are natural. Sometimes it is best to link a sentence or a large enough portion of a sentence that will reflect where a user would be going to. Make conversational links. If it helps, use the same language you would in a header tag. That is what I do. But do not over think it. It really is not that complicated.
Google gets that some links [**** - are lousy] and some don't. Just make good links and do not worry if Google is going to slap your wrist with a ruler if your grammar is not exactly correct. That just does not happen! But the people with something to sell you want you to think it does. They are our modern snake oil salesmen.
Now here is a secret I will share with you and you only. Do not let anyone know what I am about to tell you. If it gets around, who know what will happen?
There is no such thing as a bad link. True! Just links from bad sites. Some links can be improved of course, but it is the value of the linking page that is the key. Not so much the link itself. Again, some links can be improved. But keep in mind that I can have the most well optimized gold plated blessed by the freaking Pope himself link and if the linking page is no good, then what have I done?? Nothing. Links go bad when the site goes bad. Not when the verbiage is graded by Mother Superior.