IF you are in the Eiffel Tower area, avoid the restaurants at the intersection of Rue Saint-Dominique/Ave Rapp/Avenue de la Bourdonnais. One of these is listed on the Les Frenchies for avoiding as they overcharge and are one of the ones where waiters try to get tourists to leave tips. I think it is Le Champs du Mars but am not 100% certain so I just avoid anything there.
From the Eiffel Tower, walk east along Rue Saint-Dominique and there are a couple of well-reviewed restaurants along there. Les Cocottes and La Fontaine de Mars are good. Continue east to Rue Cler and take a right. I enjoy Cafe Roussillon on the corner of Rue Cler and Rue de Grenelle. I never make a reservation unless I am meeting others as I will go just before 7 and can always get in as a solo diner. I also really like Di Felice, an Italian restaurant just east on Rue de Grenelle from Rue Cler. I also never reserve here as, again I go at 7. If you continue on Rue Cler, there is a small cafe Calle Le Petit Cler that has good food.
If you continue down to Avenue de la Motte-Picquet there are some restaurants along here where friends have eaten that they enjoy. The menus are a bit "meaty" for me as a vegan. I suspect you will need reservations if you think these sound interesting and you will be in the neighborhood.
Le Florimond
Auberge Bressane
I've also always wanted to eat at Cafe Max across form Auberge Bressane due to the history:
https://www.sortiraparis.com/en/where-to-eat-in-paris/restaurant/articles/282172-cafe-max-generous-french-cuisine-in-this-resistance-stronghold
https://www.cafemax.fr/en
And sigh...I'm not crazy about Les Frenchies. First, I can't stand to watch people eat/moan/eat/wave their silverware around. 2nd anything they recommend is going to be overtaken like their earlier recommended La Jacobine.
But you do you and if their recommendations sound good, go for it.