Yes, in my professional opinion, you could potentially be a very good candidate for porcelain veneers, especially since you are not interested in going through orthodontic treatment again. The discoloration in your photos appears fairly significant and has a somewhat gray tone in several areas. Teeth with this type of darker or gray discoloration often do not respond as dramatically to whitening as teeth with more yellow-toned staining. If your goal is to make your teeth substantially whiter and create a more uniform color, porcelain veneers may be a much more predictable long-term option. Veneers can also be used to make crowded or uneven teeth appear significantly straighter. Your crowding does not appear as severe as you may think, although I do see that one of your lateral incisors is positioned farther outward than the surrounding teeth. When veneers are used to improve alignment, a cosmetic dentist can often add more porcelain to teeth that sit farther inward so they appear to come forward into better alignment. A tooth that already sticks farther outward may require somewhat more tooth reduction so the final veneer does not look bulky and can be brought visually into line with the neighboring teeth. So yes, veneers can potentially address both the discoloration and the appearance of crowding in a case like yours. The key is choosing a cosmetic dentist with substantial experience using veneers to correct alignment issues, because these cases require very careful planning of tooth preparation, proportions, and final contours. I would look for a dentist with a large number of strong reviews specifically mentioning veneers, as well as an extensive before-and-after portfolio showing cases involving crowding, discoloration, and teeth that were made to look straighter with veneers.
