AK Gauzy is a good replacement for Future/etc., but pricey in little bottles.
The chief benefit of Future was:
near universal availability, and dirt cheap in big bottles.
Like you, finishing coats are my nemesis, but Windsor & Newton Galleria in mat satin and gloss finish are my least problematic clearcoats.
It has excellent handling, can be hairy stick or airbrush applied, is self levelling and durable.
Ps you don’t need a super high gloss finish for decalling.
1 or 2 light coats where decals go, trim decals & apply as usual.
Various brands of application/setting solutions can be used.
[Tip: any ‘burn-in’ from over use of setting solutions can be lightly sanded with nail buffing sticks & re clear coated]
Finish with a clearcoat to suit