Breeding roses for very strong fragrance

I have around 30 varieties (hybrid teas, floribundas, OGRs, one rugosa and DAs) to experiment with, all of them were selected for very strong fragrance as I treat it as most important thing for flowers.

I have some varieties that are considered extremely strongly scented but I am curious to create new breeds that perhaps would be even more fragrant. Some examples I was thinking of;

Madame Issac Pereire× Yolande d’aragon

Madame Issac Pereire× Spirit of Freedom

Chandos Beauty× Francis Meilland

Gertrude Jekyll× Spirit of Freedom

Souvenir de la malmaison×Duchesse de Rohan

Im my garden fungal diseases are not bad- suprisingly I never noticed blackspot on MIP or SDLM or YDA however there was some issue with mildew.

Anyone has any experience? Anyone tried those crosses.