Spring 2023 Garden layout

I am very new to anything gardening and have 2 4X4 boxes ready. Below are my thoughts for the layout, but admit, I've really struggled in placing plants, trying to use companion planting as best as I can.  Does anyone have any suggestions?  I'm in the West Houston, Texas area. TIA

Tomato Bodacious Hybrid (1)	Borage	Cucumber (2) Spacemaster	Tomato Brandywine Pink (1)
Marigold Red Knight	Pepper California Wonder (1)	Marigold Favorite Blend	Borage
Basil (1)	Pepper California Wonder (1)	Marigold Red Knight	Calendula / Nasturtium
Tomato 4th of July (1)	Oregano (1)	Onion (16) Tokyo Long White	Tomato Napa Grape Hybrid (1)

Sunflower (Tiger Eye Hybrid) Okra Clemson Spineless (1)	Bean (2) Corn (2)	Bean (2) Corn (2)	Sunflower (Tiger Eye Hybrid) Okra Clemson Spineless (1)
Cucumber Merlin Hybrid (2) + 2 bean	Corn (4)	Corn (4)	Cucumber Homemade Pickles (2) + 2 bean
Nasturtium Calendula Marigold + 2 bean	Corn (4)	Corn (4)	Borage + 2 beans
Grey Zucchini Squash	Corn (2) + calendula or marigold	Corn (2) Nasturtium	Grey Zucchini Squash

OhioGardener, Thanks for your response.  I did forget to mention the box direction.  The boxes are side by side with the top rows being on the north side.  I've read some conflicting things on growing tomatoes.  Mel's book suggests 1 tomato per square, but then some of the gardening apps suggest 1 plant per 4 squares...and I've read not to place them together.  I agree about the taller plants shading the smaller ones so I'm open to ideas for what works well with tomatoes that has a similar height.  There is so much information to take in and decipher that it can be quite paralyzing, which is one of the reasons I've had such trouble coming up with a layout.  

Sjustman,  I would forgo the flowers this first year and concentrate on just growing 32 sq. ft. of veggies.  If you end up with an empty square   , then stick a marigold in it.  

Merlin hybrid cucumber is a vining plant so it should be planted on the north trellis.

Spacemaster cucumber is a 2-3' bush variety and may be fine with just a tomato cage to climb..
Homemade Pickles is also a bush variety.

Bodacious tomato appears to be a shorter, bush type.
4th of July tomato is a bush variety.
Napa Grape Hybrid large bush so front row 4 squares

Brandywine Pink is an indeterminate and should be planted on the north trellis.
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Sunflower and okra are both 1 per sq ft.  I'm guessing you are still deciding which to plant.  I have read that sunflowers are competitive (don't know if that's a myth).  Maybe this year you could go with okra in a veggie bed.  They both are tall and need the north side or west side, but do not need a trellis.  But, by putting a trellis on both beds opens up options for the next planting season.

The zucchini are bed hogs and need 9 square feet or 4 front corner squares each.

In summary, plants that need the north trellis are Brandywine, Merlin hybrid cucumber, and beans, if they are a vining (tall) variety.

Plants that need the north end or west side are okra and sunflowers.  

Peppers can be on the south side or west side.

I didn't include the oregano and basil but when you are firmed up, you can figure out where to stick them. If oregano is an annual in your area, no problem.  If it is a perennial, you may want to put it in a separate pot so it doesn't invade other squares.  It's part of the invasive mint family.

I scratched out this plot plan so you can get a visual of how 4 of the selected plants take up 16 squares, or half of the beds.  I gave you 2 trellised squares for the Brandywine for your first year to learn about growing to just the main stem, and maybe one daughter/sucker.